Search results “Determining polarity lab activity”
Polar and non polar substances | Solutions | Chemistry
A polar molecule is one in which the atoms are arranged such that one end of the molecule has a positive charge and the opposite end has a negative charge.In this video we see that polar substances only dissolve in polar solvents and non polar substances in non polar solvents. Potassium permanganate, a polar compound, is added to water, a polar solvent and to carbon tetrachloride, a non polar solvent. We see that it dissolves only in water. In a similar fashion, a non polar element iodine is added to the same two solvents. This time, we see, that iodine only dissolves in carbon tetrachloride.
Views: 49710 KClassScienceChannel
VSEPR Theory: Introduction
To see all my Chemistry videos, check out http://socratic.org/chemistry This is an introduction to the basics of VSEPR Theory. VSEPR theory is a set of rules for how to look at a Lewis structure and determine the three dimensional (3D) shape of a molecule. The shapes have to do with the location of bonds and lone electrons pairs. In this video, we'll look at the following shapes: linear, trigonal planar, bent, tetrahedral, and trigonal bipyramidal
Views: 1600509 Tyler DeWitt
Polar Molecules Tutorial: How to determine polarity in a molecule
This video looks at how to determine polarity in a molecule by understanding how the bond polarities, molecule shape, and outside atoms influence polarity using bond polarity vector addition. This includes a flow chart that guides you through the various decisions needed to determine if a molecule is polar or not. Wikipedia 1/1/2018: In chemistry, polarity is a separation of electric charge leading to a molecule or its chemical groups having an electric dipole or multipole moment. Polar molecules must contain polar bonds due to a difference in electronegativity between the bonded atoms. A polar molecule with two or more polar bonds must have a geometry which is asymmetric in at least one direction, so that the bond dipoles do not cancel each other. While the molecules can be described as "polar covalent", "nonpolar covalent", or "ionic", this is often a relative term, with one molecule simply being more polar or more nonpolar than another. However, the following properties are typical of such molecules. A molecule is composed of one or more chemical bonds between molecular orbitals of different atoms. A molecule may be polar either as a result of polar bonds due to differences in electronegativity as described above, or as a result of an asymmetric arrangement of nonpolar covalent bonds and non-bonding pairs of electrons known as a full molecular orbital. Polar molecules[edit] The water molecule is made up of oxygen and hydrogen, with respective electronegativities of 3.44 and 2.20. The dipoles from each of the two bonds (red arrows) add together to make the overall molecule polar. A polar molecule has a net dipole as a result of the opposing charges (i.e. having partial positive and partial negative charges) from polar bonds arranged asymmetrically. Water (H2O) is an example of a polar molecule since it has a slight positive charge on one side and a slight negative charge on the other. The dipoles do not cancel out resulting in a net dipole. Due to the polar nature of the water molecule itself, polar molecules are generally able to dissolve in water. Other examples include sugars (like sucrose), which have many polar oxygen–hydrogen (−OH) groups and are overall highly polar. If the bond dipole moments of the molecule do not cancel, the molecule is polar. For example, the water molecule (H2O) contains two polar O−H bonds in a bent (nonlinear) geometry. The bond dipole moments do not cancel, so that the molecule forms a molecular dipole with its negative pole at the oxygen and its positive pole midway between the two hydrogen atoms. In the figure each bond joins the central O atom with a negative charge (red) to an H atom with a positive charge (blue). The hydrogen fluoride, HF, molecule is polar by virtue of polar covalent bonds – in the covalent bond electrons are displaced toward the more electronegative fluorine atom. Ammonia, NH3, molecule the three N−H bonds have only a slight polarity (toward the more electronegative nitrogen atom). The molecule has two lone electrons in an orbital, that points towards the fourth apex of the approximate tetrahedron, (VSEPR). This orbital is not participating in covalent bonding; it is electron-rich, which results in a powerful dipole across the whole ammonia molecule. Resonance Lewis structures of the ozone molecule In ozone (O3) molecules, the two O−O bonds are nonpolar (there is no electronegativity difference between atoms of the same element). However, the distribution of other electrons is uneven – since the central atom has to share electrons with two other atoms, but each of the outer atoms has to share electrons with only one other atom, the central atom is more deprived of electrons than the others (the central atom has a formal charge of +1, while the outer atoms each have a formal charge of −​1⁄2). Since the molecule has a bent geometry, the result is a dipole across the whole ozone molecule. When comparing a polar and nonpolar molecule with similar molar masses, the polar molecule in general has a higher boiling point, because the dipole–dipole interaction between polar molecules results in stronger intermolecular attractions. One common form of polar interaction is the hydrogen bond, which is also known as the H-bond. For example, water forms H-bonds and has a molar mass M = 18 and a boiling point of +100 °C, compared to nonpolar methane with M = 16 and a boiling point of –161 °C. Nonpolar molecules[edit] A molecule may be nonpolar either when there is an equal sharing of electrons between the two atoms of a diatomic molecule or because of the symmetrical arrangement of polar bonds in a more complex molecule. Not every molecule with polar bonds is a polar molecule. Carbon dioxide (CO2) has two polar C=O bonds, but the geometry of CO2 is linear so that the two bond dipole moments cancel and there is no net molecular dipole moment; the molecule is nonpolar.
Views: 135028 Crash Chemistry Academy
Chemistry Experiment 5.2 Polar and Nonpolar (Berean Builders)
Chemistry Experiment 5.2 Polar and Nonpolar Discovering Design with Chemistry by Dr. Jay L. Wile Fig Leaf Times Two by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1200096 Artist: http://incompetech.com/
Views: 559 Teach at Home
How to make Colorful Milk Polarity Experiment
It's time for another polarity experiment! This time, we will show you simple way to learn about the polarity of different liquids. All you need is a little bit of milk, food colors, dishwashing soap and a Cotton Swab. Kids will love this activity because of a cool effect and you can experiment with different liquids to get different effects. For complete explanation of science behind experiment, visit http://www.stemlittleexplorers.com/en/make-colorful-milk-polarity-experiment/ Visit us at http://www.stemlittleexplorers.com And follow us at: Facebook https://www.facebook.com/stemlittleexplorers/ Twitter https://twitter.com/Explorers_STEM Pinterest https://www.pinterest.com/STEM_Little_Explorers/ Authors: Vedran Leder & Iva Erceg Music: "Private Eye" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License http://creativecommons.org/licenses/by/3.0/
Views: 1115 STEM Little Explorers
Identifying ionic and covalent bonds plus experiments for f
Video by Daniela Rangel, Jocelyn Diez and destiny Lumbreras, for mr Jackson's 3rd period chem class
Views: 28431 Cshm chemistry 35
Determination of Concentration of KMnO4 Solution Using Oxalic Acid - MeitY OLabs
This video channel is developed by Amrita University's CREATE http://www.amrita.edu/create ▶ For more Information @ http://amrita.olabs.co.in/?sub=73&brch=8&sim=115&cnt=1 ▶ Online Labs for School lab Experiments (Olabs) http://www.olabs.edu.in/ ▶ Learn more about Amrita University http://www.amrita.edu ▶ Subscribe @ http://www.youtube.com/amritacreate https://www.facebook.com/onlinelabs Copyright © 2013 Amrita University Developed by CDAC Mumbai & Amrita University under research grant from Department of IT, Government of India Determination of Concentration of KMnO4 Solution Using Oxalic Acid :- The oxidation and reduction reactions in aqueous solutions involve the transfer of electrons from one species to another. In the oxidation of a substance electron(s) is (are) transferred from the species and in reduction, electron(s) is (are) gained by the species. Oxidation and reduction reactions occur simultaneously. A reaction, which involves simultaneous oxidation and reduction, is called a redox reaction. The titrations involving redox reaction are called redox titrations. In Redox titrations involving potassium permanganate, it acts as a powerful oxidising agent. This video explains how to determine the strength of potassium permanganate solution by titrating it against a standard solution of Oxalic acid.
Views: 223445 amritacreate
phET Simulation on Molecule Polarity
Demonstration of the phET simulation on molecule polarity.
Views: 5539 Lynette McDee
Intermolecular Forces Magic Trick
Discover the magical properties of some common materials. This video is part of the Flinn Scientific Best Practices for Teaching Chemistry Video Series, a collection of over 125 hours of free professional development training for chemistry teachers - http://elearning.flinnsci.com ATTENTION: This demonstration is intended for and should only be performed by certified science instructors in a safe laboratory/classroom setting. Be sure to subscribe and check out more videos! Subscribe: https://www.youtube.com/channel/FlinnScientific/ Facebook: https://www.facebook.com/FlinnScientific/ Website: https://www.flinnsci.com/
Views: 22019 FlinnScientific
Bonding Models and Lewis Structures: Crash Course Chemistry #24
Models are great, except they're also usually inaccurate. In this episode of Crash Course Chemistry, Hank discusses why we need models in the world and how we can learn from them... even when they're almost completely wrong. Plus, Lewis Structures! -- Table of Contents Models :06 Linus Pauling & The Bonding Model 9:16 Lewis Dot Structures 4:27 Ionic Bonds 5:30 Covalent Bonds 6:10 Double Bonds 7:17 Triple Bonds 8:14 -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Subbable: http://subbable.com/crashcourse
Views: 1453580 CrashCourse
IRAQ / Qadissiya University / College of Education / Physics Department / Optics Lab .. polarimeter can be used in the chemical industry, hospitals, colleges and universities and scientific research in situations, for measuring the organic substances with optical rotation. With the aid of the disk polarimeter, the specific gravity, purity, concentration, and content of thousands of active materials, such as sugar solution, turpentine oil and camphor, can be measured.
Views: 105234 physicslove1
Positive or Negative? How to Find Electric Charge Polarity
Find out if something is positively or negatively charged using just a DIY electroscope. This determines the sign of the electrostatic charge on an electrostatically charged object. The electroscope is first inductively charged from the object being tested. Then a plastic coke bottle is used as an object with known polarity in order to do the test and is triboelectrically charged. The video showing how to make your own electroscope is: http://youtu.be/2PmWlPjV6n0 How inductive charging works video: http://youtu.be/-JsVZwc1dOo The Triboelectric effect video http://youtu.be/Fph08eKTVZM To follow me on Twitter: https://twitter.com/#!/RimStarz http://rimstar.org
Views: 98860 RimstarOrg
Liquid-liquid extraction (or separation)
Shows how to go about performing a liquid-liquid extraction using a separating funnel.
Views: 520263 David Read
Optical activity | Stereochemistry | Organic chemistry | Khan Academy
How optically active compounds rotate plane polarized light. Watch the next lesson: https://www.khanacademy.org/science/organic-chemistry/stereochemistry-topic/optical-activity/v/optical-activity-calculations-new?utm_source=YT&utm_medium=Desc&utm_campaign=organicchemistry Missed the previous lesson? https://www.khanacademy.org/science/organic-chemistry/stereochemistry-topic/optical-activity/v/fischer-projection-practice?utm_source=YT&utm_medium=Desc&utm_campaign=organicchemistry Organic Chemistry on Khan Academy: Carbon can form covalent bonds with itself and other elements to create a mind-boggling array of structures. In organic chemistry, we will learn about the reactions chemists use to synthesize crazy carbon based structures, as well as the analytical methods to characterize them. We will also think about how those reactions are occurring on a molecular level with reaction mechanisms. Simply put, organic chemistry is like building with molecular Legos. Let's make some beautiful organic molecules! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Organic Chemistry channel: https://www.youtube.com/channel/UCNKPjijOc0WEJ7DIV_Vay3g?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Static Electricity and Water
What happens when an electrically charged object is brought near a stream of water? This is an easy experiment you can do yourself that shows that water molecules are polar! [Closed Captioned]
Views: 485597 Jefferson Lab
What Happens when Stuff Dissolves?
To see all my Chemistry videos, check out http://socratic.org/chemistry We'll look at what happens when you dissolve ionic and covalent compounds in water. Ionic compounds break apart into the ions that make them up, a process called dissociation, while covalent compounds only break into the molecules, not the individual atoms.
Views: 389299 Tyler DeWitt
About the Factors Affecting Solubility Lab Kit
Why is it that some solids take so much longer to dissolve than others? What factors affect the rate at which a solute dissolves in solution? In this laboratory activity, students will investigate the effects of stirring, temperature, surface area, and the amount of solute already dissolved in solution on the rate of dissolving. Be sure to subscribe and check out more videos! Subscribe: https://www.youtube.com/channel/FlinnScientific/ Facebook: https://www.facebook.com/FlinnScientific/ Website: https://www.flinnsci.com/
Views: 771 FlinnScientific
Atomic Hook-Ups - Types of Chemical Bonds: Crash Course Chemistry #22
Atoms are a lot like us - we call their relationships "bonds," and there are many different types. Each kind of atomic relationship requires a different type of energy, but they all do best when they settle into the lowest stress situation possible. The nature of the bond between atoms is related to the distance between them and, like people, it also depends on how positive or negative they are. Unlike with human relationships, we can analyze exactly what makes chemical relationships work, and that's what this episode is all about. If you are paying attention, you will learn that chemical bonds form in order to minimize the energy difference between two atoms or ions; that those chemical bonds may be covalent if atoms share electrons, and that covalent bonds can share those electrons evenly or unevenly; that bonds can also be ionic if the electrons are transferred instead of shared: and how to calculate the energy transferred in an ionic bond using Coulomb's Law. -- Table of Contents Bonds Minimize Energy 01:38 Covalent Bonds 03:18 Ionic Bonds 05:37 Coulomb's Law 05:51 -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Subbable: http://subbable.com/crashcourse
Views: 1665577 CrashCourse
Know your magnets polarities
This video is part of a little series of videos I'm making on handling neodymium magnets safely. In this video I will show you how to determine the poles on disc, cube and sphere magnets. Knowing your magnets polarity is very useful for safely combining large magnets as shown in one of my other videos in this series. Music is by Kevin MacLeod (from his website incompetech.com) and Nick van Man (from his website music4yourvids.co.uk) used under Creative Commons license. Tracks used: 0:00 - 0:06 'Supernatural' by Kevin MacLeod ISRC: USUAN1100397 0:06 - 5:40 'Watching the sun go down' by Rick Van Man Here are the captions in case you don't understand my Danish accent: - Hi. In an earlier video I showed the advantages of knowing the polarities of your magnets. In this video I'm gonna show you how to determine the polarities of your magnets. Where is the north pole? - The professional way is to buy a dedicated pole detector. With just a click on a button it will tell you whether it's a north pole or a south pole you are pointing towards. - This is my favorite method. Use an old-school compass. - Let's start with a disc magnet as these are the easiest to determine. The poles are on the large flat surfaces. I let the magnet stand on its side so the poles are pointing towards the compass. Now I spin the magnet until the south part of the compass needle - which is actually a small magnet in itself - points towards the disc magnet. - With magnets opposite polarities attracts so now I know the north pole of my disc magnet is pointing towards the compass. I mark the north pole of the magnet with an N. And double check just for good measure. If I spin the magnet with no poles pointing towards the compass the needle doesn't move. This is valuable information for our next challenge: The cube magnet. - On a cube magnet you can't tell by the naked eye on which two surfaces the poles are. So you just have to put it randomly down. In this case I was a little unlucky and put the magnet down with its sides pointing towards the compass. Because the compass needle is not spinning along with the magnet. Therefore the poles of the magnet must be on the top and bottom surfaces and I have to tilt the magnet 90 degrees. Now the poles are pointing towards the compass and I do exactly the same as with the disc magnet. - With south pointing towards the magnet I have found the north pole of my magnet. Right here. I mark the north pole of the magnet with an N. - And now for the real challenge: The sphere magnet. Where are the poles on this one? - With a magnet that can roll in all directions it is very hard to get a steady and exact reading. The solution is to put the magnet on what I call a security board. This is just a thin wooden plate with a metal plate glued to the backside. On this board the magnet will always align with one pole pointing directly into the board and the other pole pointing directly upwards. - By now you should have figured out how to find the north pole. - The final method I am going to show you is to use the magnet as a compass in itself. In this case I'm going to use two small magnets from a play set. By hanging them on a long tension-free line the magnets will act as a compass and align with the Earth's magnetic field. I cannot force them to point in another direction. Eventually they will stop pointing in the same direction everytime. Make sure there is not metal close by - just like when you use a compass. - Here I point towards the geographic north. By definition the north pole of a magnet is the pole pointing towards the geographic north so northpole on a magnet is short for northpointing pole. That means I can mark the pole pointing towards north as the north pole. - Another version of this method is to float the magnet on some styrofoam in the middle of a waterbath. It takes a little more preparation but has much faster response time as shown. - Once you have determined the polarities of one magnet you can use it to determine it on all other magnets. The south pole of the marked magnet will stick to the north pole of your unmarked magnet.
Views: 137014 Brainiac75
13. Polar covalent bonds; VSEPR theory
MIT 5.111 Principles of Chemical Science, Fall 2008 View the complete course: http://ocw.mit.edu/5-111F08 Instructor: Catherine Drennan, Elizabeth Vogel Taylor License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 53039 MIT OpenCourseWare
Determining the Rate of Sea Floor Spreading
A demo of this learning activity.
Views: 5942 MrRogersESCI
(North-South) To find the magnetic moment & neutral points of bar magnet
To determine the magnetic moment and neutral points of bar magnet and draw magnetic lines of force with the help of compass when noth of the magnet is in the direction of geographic south
Views: 1956 Varsha Parakh
Intermolecular Forces and Boiling Points
Why do different liquids boil at different temperatures? It has to do with how strongly the molecules interact with each other. Find out all the different ways, and how to use them to make predictions about matter! Subscribe: http://bit.ly/ProfDaveSubscribe [email protected] http://patreon.com/ProfessorDaveExplains http://professordaveexplains.com http://facebook.com/ProfessorDaveExpl... http://twitter.com/DaveExplains General Chemistry Tutorials: http://bit.ly/ProfDaveGenChem Organic Chemistry Tutorials: http://bit.ly/ProfDaveOrgChem Biochemistry Tutorials: http://bit.ly/ProfDaveBiochem Classical Physics Tutorials: http://bit.ly/ProfDavePhysics1 Modern Physics Tutorials: http://bit.ly/ProfDavePhysics2 Mathematics Tutorials: http://bit.ly/ProfDaveMaths Biology Tutorials: http://bit.ly/ProfDaveBio American History Tutorials: http://bit.ly/ProfDaveAmericanHistory
Views: 528243 Professor Dave Explains
112L Bond Polarity, Molecular Polarity, IMF's (#1)
Closed Captions can be turned on or off by clicking on the "CC" icon located in the bottom right corner of the video player.
Views: 2121 eku_chem_lab
Water - Liquid Awesome: Crash Course Biology #2
Hank teaches us why water is one of the most fascinating and important substances in the universe. Follow SciShow on Twitter: http://www.twitter.com/scishow Like SciShow on Facebook: http://www.facebook.com/scishow Review: Re-watch = 00:00 Introduction = 00:42 Molecular structure & hydrogen bonds = 01:38 Cohesion & surface tension = 02:46 Adhesion = 03:31 Hydrophilic substances = 04:42 Hydrophobic substances = 05:14 Henry Cavendish = 05:49 Ice Density = 07:45 Heat Capacity = 09:10 Crash Course Biology is now available on DVD! http://dftba.com/product/1av/CrashCourse-Biology-The-Complete-Series-DVD-Set Citations: http://www.extension.umn.edu/distribution/youthdevelopment/components/0328-02.html http://www.uni.edu/~iowawet/H2OProperties.html http://www.hometrainingtools.com/properties-water-science-teaching-tip/a/1274/ http://science.howstuffworks.com/environmental/earth/geophysics/h2o7.htm http://www.robinsonlibrary.com/science/chemistry/biography/cavendish.htm http://chemistry.mtu.edu/~pcharles/SCIHISTORY/HenryCavendish.html http://www.nndb.com/people/030/000083778/ http://www.notablebiographies.com/Ca-Ch/Cavendish-Henry.html TAGS: water, hydrogen, oxygen, molecule, covalent bond, cohesion, adhesion, polarity, hydrogen bond, surface tension, capillary action, hydrophilic, hydrophobic, ionic bond, ion, universal solvent, henry cavendish, chemistry, specific gravity, density, heat capacity, evaporation, biology, crashcourse, crash course, hank green Support CrashCourse on Subbable: http://subbable.com/crashcourse
Views: 3015813 CrashCourse
Intermolecular Forces Lab
Intermolecular Forces are forces that act between molecules rather than Interamolecular Forces which act within a molecule. These experiments show the differences in surface tension, evaporation rate, and solubility in vegetable oil in order to investigate the intermolecular forces of each fluid. Fluids used include water, isopropyl alcohol (70%), and glycerin. To follow @SpencerBPerry on Twitter go to https://twitter.com/SpencerBPerry
Views: 6492 Spencer Perry
C2H4 Molecular Geometry / Shape and Bond Angles
A quick explanation of the molecular geometry of C2H4 including a description of the C2H4 bond angles. Looking at the C2H4 Lewis structure we can see that there two Carbon (C) atoms in the center of the structure. We'll look at the molecular geometry for just one of those Carbon atoms since they are symmetrical. Based on VSEPR Theory (Valence Shell Electron Pair Repulsion Theory) these electrons will repel the electron clouds of the two Oxygen atoms on the end. As a result they will be pushed down giving the C2H4 molecule a trigonal planar molecular geometry or shape with respect to the Carbon on the left. The Carbon on the right will also have a trigonal planar molecular shape. The C2H4 bond angle will be about 120 degrees since it has a trigonal planar molecular geometry. Get more chemistry help at http://www.thegeoexchange.org/chemistry/bonding/
Views: 91787 Wayne Breslyn
Electrochemistry: Crash Course Chemistry #36
You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content. Chemistry raised to the power of AWESOME! That's what Hank is talking about today with Electrochemistry. Contained within, Hank discusses electrochemical reactions, half reactions, how batteries work, galvanic cells, voltage, standard reduction potential, cell potential, electrolysis, and electro plating and the things that go into making it possible for you to watch this episode of Crash Course Chemistry! -- Table of Contents Electro Chemical Reactions 0:13 Half Reactions 1:42 How Batteries Work 1:47 Galvanic Cells 3:18 Calculating Voltage 4:12 Standard Reduction Potential 4:42 Standard Cell Potential 6:03 Electrolysis 7:24 Electroplating 7:02 -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Subbable: http://subbable.com/crashcourse
Views: 1300569 CrashCourse
how to identify base, emitter and collector of PNP of NPN transistor
you can easily identify the comman, base and emitter of PNP or NPN transistor by using of multimeter.
Views: 213343 MsArchu143
What is the shape of a molecule
Molecular geometry, also known as the molecular structure, is the three-dimensional structure or arrangement of atoms in a molecule. Understanding the molecular structure of a compound can help determine the polarity, reactivity, phase of matter, color, magnetism, as well as the biological activity.
Science - Magnet - More about magnets - English
This short animated science video in English is meant for upper primary class children (age 11-13 years). This video explains that earth behaves like a magnet and why a freely suspended magnet always come to rest in North --South direction only. It also demonstrates that all magnets have both the North and South poles and a pole cannot be isolated.
Views: 56375 Bodhaguru
Lewis Diagrams Made Easy: How to Draw Lewis Dot Structures
This is a Videoscribe tutorial on how to draw Lewis diagrams for elements and simple molecules. Lewis diagrams (aka Lewis structures, Lewis dot structures, Lewis dot diagrams) are useful because they use simple drawings to show how atoms share valence electrons in molecules, polyatomic ions, and other covalent structures. This is my first tutorial in the series. Please also see the second video in my Lewis diagram series: https://youtu.be/qwqXAlvNxsU For simple molecules, follow these 5 steps: 1) count all the valence electrons 2) put the singular atom in the middle 3) draw in single bonds 4) put remaining electrons in as lone pairs 5) give every atom an octet or duet by turning lone pairs into double or triple bonds as needed My goal is to make chemistry easier ;) http://ketzbook.com
Views: 781782 ketzbook
Electronegativity Demonstration Device
Build a simple demonstration device to demonstrate the electron tug-of-war between atoms. This video is part of the Flinn Scientific Best Practices for Teaching Chemistry Video Series, a collection of over 125 hours of free professional development training for chemistry teachers - http://elearning.flinnsci.com ATTENTION: This demonstration is intended for and should only be performed by certified science instructors in a safe laboratory/classroom setting. Be sure to subscribe and check out more videos! Subscribe: https://www.youtube.com/channel/FlinnScientific/ Facebook: https://www.facebook.com/FlinnScientific/ Website: https://www.flinnsci.com/
Views: 3153 FlinnScientific
Covalent Bonds Project
In this video you will learn about covalent bonds and the different types of covalent bonds and why they happen. Topics: Covalent bonds Polar covalent bonds Non-polar covalent bonds Electronegative THE EXPERIMENT: In the experiment, Fire Ball, you will be learning about what happens when you mix hand sanitizer and fire.
Views: 42 Vanessa Espinosa
Intermolecular Forces Experiment
Views: 37 Juna Belle
06 Practical Demonstrations of Intermolecular Forces
This lesson contains practical demonstrations of all the properties of substances related to their intermolecular forces that were discussed in the last lesson.
Views: 7385 Mindset Learn
This video gives you the complete concepts behind the Solubility of organic molecules in water .
Electric Charge: Crash Course Physics #25
Moving on to our unit on the Physics of Electricity, it's time to talk about charge. What is charge? Is there a positive and negative charge? What do those things mean? In this episode, Shini talks about electrostatic forces, electrical charge, Coulomb's law, and the force between charged particles. Get your own Crash Course Physics mug from DFTBA: http://store.dftba.com/products/crash... The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list... -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashC... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Patreon: http://www.patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 748034 CrashCourse
Optical rotation of sugars – chirality
Declan Fleming shows us how the optical properties of sugars can be revealed by the use of polarisers. See the article that accompanies this video in the January 2012 issue of Education in Chemistry magazine - http://www.rsc.org/Education/EiC/issues/2012January/chirality-in-sugars.asp This is part of the Education in Chemistry Exhibition Chemistry series: chemistry demonstrations to capture your students' imaginations: http://rsc.li/EiCExChem
Biological Molecules - You Are What You Eat: Crash Course Biology #3
Hank talks about the molecules that make up every living thing - carbohydrates, lipids, and proteins - and how we find them in our environment and in the food that we eat. Crash Course Biology is now available on DVD! http://dftba.com/product/1av/CrashCourse-Biology-The-Complete-Series-DVD-Set Follow CrashCourse on Twitter: http://www.twitter.com/thecrashcourse Like CrashCourse on Facebook: http://www.facebook.com/youtubecrashcourse Resources for this episode in the Google Document here: http://dft.ba/-citations2 TAGS: biological molecules, carbohydrates, lipids, proteins, nucleic acids, food, biolography, william prout, urea, energy, monosaccharides, glucose, fructose, disaccharides, sucrose, polysaccharides, simple sugars, cellulose, starch, glycogen, glycerol, fatty acid, triglyceride, phospholipid, steroid, cholesterol, enzymes, antibodies, hormones, amino acids, nitrogen, polypeptides, protein synthesis, biology, molecule, crashcourse, hank green Support CrashCourse on Subbable: http://subbable.com/crashcourse
Views: 4126301 CrashCourse
Kool-Aid Chromatography
For more information, visit http://www.bio-rad.com/yt/2/biotech-lab-textbook. This video demonstrates the separation of Kool-Aid drink mix pigments based on differences in polarity. Different percentages of alcohol are used in this chromatographic separation technique. This activity is included in the laboratory textbook Biotechnology: A Laboratory Skills Course. http://www.bio-rad.com/evportal/destination/product?catID=LKN6R715&WT.mc_id=yt-lse-ww-biotech-20121012-Q6pGleEzIGk We Are Bio-Rad Explorer. Our Mission: Bio-Rad’s Explorer program provides easy access to engaging hands-on science learning experiences that spark interest in science and its influence on the world. To do this we: Provide high quality, relevant, learning experiences based on real world science Empower educators with skills and confidence to deliver engaging, memorable lessons Connect with Bio-Rad Explorer Online: Website: http://www.bio-rad.com/en-us/education Twitter: https://twitter.com/BioRadEducation Pinterest: https://www.pinterest.com/bioradexplorer/ LinkedIn: https://www.linkedin.com/company/1613226/ Facebook: https://www.facebook.com/biorad/ Instagram: @BioRadLabs Snapchat: @BioRadLabs
Views: 20809 Bio-Rad Laboratories
Magnetic Field Due to a Current in a Circular Coil
Useful for CBSE, ICSE, NCERT & International Students Grade : 10 Subject :Physics Lesson :Magnetic Effect of Electric Current Topic: Magnetic Field Due to a Current in a Circular Coil A wire carrying a current generates a magnetic field B whose magnitude and direction at each point in space depend on the length and shape of the wire, the current flowing through the wire, and the location of the point at which the field is determined. Visit www.oztern.com to find personalized test preparation solutions for Pre Medical - AIPMT, AIIMS, JIPMER, State, Pre Engineering - IIT JEE, JEE MAIN, BITSAT, State and Foundations - Class 6 to 10.
Views: 138222 CBSE
Video 37: Determining Solubility
In this video I show you how to determine whether or not a compound will be soluble in water by using a solubility table. When something is not soluble, we say it is insoluble. This means that the ionic compound WILL NOT dissociate into its ions in water, but instead remain intact. (as a solid)
Factors that Affect Solubility - CLEAR & SIMPLE
CLEAR & SIMPLE - Solubility of Substances - What Changes the Solubility of a Substance - Solubility Curves - Saturated, Unsaturated, Supersaturated Solutions. This video explains the factors that affect solubility. The video explains the relationship between heat-temperature and solubility, pressure and solubility, surface area and solubility, agitation-shaking and solubility and the type of solvent, ionic, polar covalent, nonpolar covalent.
Views: 45540 sciencepost
Polar Vs. Nonpolar Compounds
Polar Vs. Non-polar Compounds Purpose: The purpose of this lab is to investigate polar and no polar compounds. Note: Benjamin Franklin discovered that there where two kinds of charges, a positive and a negative charge. Note: Water is more polar than Acetone. Note: The ancient Greek discovered static electricity. That's where we got the word electron from Materials: • Liquid Distilled Water H2O • Liquid Acetone C3H6O • Liquid Carbon Tetrachloride CCI4 • (3) Buret • (3) Buret Clasp • (3) Stopcock • (2) Ring Stand • (3) Small Beaker • Wool • Plastic Rod • Silk • Glass stick • Electroscope Procedure: Fill three burettes with pure liquids in each of them have water in its own, acetone in its own, and carbon tetrachloride in its own. Place a small beaker under all three burettes. Make sure there is a stopcock on all three of the burettes so the pure liquids will make a fine line going into the beaker. Rub wool with a plastic rod to get an electric negative charge. Rub that plastic rod that created an electric static charge above or against the electroscope. Do this with silk and glass as well. Using the buret, make a fine stream with water and charge the metal rod and place it towards the water. Do the same steps with the glass rod. Once you have diverted the water try diverting the Carbon Tetrachloride use the steps of both plastic and metal rod. Do this with Acetone and see what happens Observation: The professor filled all three burettes with pure liquids (Distilled water, Acetone, and Carbon Tetrachloride). The placed a small beaker under all three burettes. Make sure there is a stopcock on all three of the burettes so the pure liquids will make a fine line going into the beaker. There where models in front of each buret to give us a visual of the compound. Once he did this he wanted to see how it would react to an electric static charge. Then the professor took some wool and rubbed it with a plastic rod creating a negative electric charge. Using a electroscope the professor rubbed a plastic rod inside some wool to create an electric static charge and then rubbed that on top of the electroscope. Metals are good conductors of electricity, therefore the negative charge that's on the plastic rod travels down the metal hitting two little leaves, making them pull in and out as if they are breathing. This happens because on each of those leaves have the same charge and they repel one another. This lets us know if we have an electrical charge on the plastic stick. Then he took a piece of silk and did the same thing with glass. The glass and silk didn't work all to well so he proceeded on. Making a fine stream with water into the small beaker, he took the charged rod and moved it towards the water with out hitting the water or touching the water. The rod started attracting the water pulling it off its fine steam. This happened with the glass rod as well. The reason this happens is because water is polar. The Carbon tetrachloride did not divert at all. Acetone is polar but not polar as water. We did the same steps as the first two and the acetone diverted further than water did missing the rim (like most guys do on drunk nights). You can change the speed in your car with three different devices in your car. You have more than one accelerator. In your car you have the accelerator on the right to give gas, the one next to it is called breaks to decelerate to slow you down, and then you have the sternwheeler. You can change velocity either the magnitude which is speed or direction. To prove out point the professor actually looked this up. Acetone is less dense than water. Analysis: If we looked up the density in the handbook of chemistry and physics of Acetone it should come out less than the density of water and that will prove our point. Water H2O Carbon CCI4 Tetrachloride Acetone (CH3)2CO
Views: 3020 tcyaddboy

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