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Chemistry - Khan Academy

Chemistry - Khan Academy

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Videos on chemistry (roughly covering a first-year high school or college course).

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How elements relate to atoms. The basics of how protons, electrons and neutrons make up an atom. More free lessons at: http://www.khanacademy.org/video?v=IFKnq

The atom, proton, neutron and electron More free lessons at: http://www.khanacademy.org/video?v=1xSQl

An introduction to orbitals More free lessons at: http://www.khanacademy.org/video?v=yBrp8

More intuition on orbitals. Touching on electron configuration. More free lessons at: http://www.khanacademy.org/video?v=FmQoS

Introduction to using the periodic table to determine electron configurations

Figuring out configurations for the d-block elements More free lessons at: http://www.khanacademy.org/video?v=YURRe

Looking at valence electrons to figure out reactivity More free lessons at: http://www.khanacademy.org/video?v=1TZA1

Properties of alkali, alkaline earth and transition metals. Halogens and noble gases. More free lessons at: http://www.khanacademy.org/video?v=LDHg7

What an ion is. Using the periodic table to understand how difficult it is to ionize an atom. More free lessons at: http://www.khanacademy.org/video?v=ywqg9

Electronegativity, metallic nature and atomic radius.

Introduction to ionic, covalent, polar covalent and metallic bonds. More free lessons at: http://www.khanacademy.org/video?v=CGA8s

Introduction to molecular and empirical formulas. Calculating molecular mass. More free lessons at: http://www.khanacademy.org/video?v=gfBcM

Introduction to the idea of a mole as a number (vs. an animal) More free lessons at: http://www.khanacademy.org/video?v=AsqEk

Figuring out the empirical formula from a molecules mass composition

Another exercise converting a mass composition to an empirical formula. More free lessons at: http://www.khanacademy.org/video?v=sXOII

The art of balancing equations in chemistry! More free lessons at: http://www.khanacademy.org/video?v=RnGu3

Introduction to stoichiometry More free lessons at: http://www.khanacademy.org/video?v=SjQG3

Stoichiometry problem where we have a limiting reagent! More free lessons at: http://www.khanacademy.org/video?v=rESzy

Intuition behind the ideal gas equation: PV=nRT. More free lessons at: http://www.khanacademy.org/video?v=WScwP

Figuring out the number of moles of gas we have using the ideal gas equation: PV=nRT. More free lessons at: http://www.khanacademy.org/video?v=erjMi

PV/T is a constant. Figuring out the volume of an ideal gas at standard temperature and pressure (STP). More free lessons at: http://www.khanacademy.org/video?v=GwoX_

Figuring out the mass of Oxygen we have. More free lessons at: http://www.khanacademy.org/video?v=69V-6

Figuring out the molar mass of a mystery molecule at STP. More free lessons at: http://www.khanacademy.org/video?v=Osl6H

Figuring out the partial pressures of various gases in a container. More free lessons at: http://www.khanacademy.org/video?v=d4bqN

Introduction to the states or phases of matter. More free lessons at: http://www.khanacademy.org/video?v=pKvo0

More on Plasma and Hydrogen bonds. More free lessons at: http://www.khanacademy.org/video?v=Wenwt

Specifict heat and phase changes: Calculating how much heat is needed to convert 200g of ice at -10C to 110 degree steam. More free lessons at: http://www.khanacademy.org/video?v=zz4Kb

How much ice at -10 degrees C is necessary to get 500g of water down to 0 degrees C? More free lessons at: http://www.khanacademy.org/video?v=lsXcK

Understanding and interpreting phase diagrams More free lessons at: http://www.khanacademy.org/video?v=Qp87Z

Van Der Waals Forces: London Dispersion Forces, Dipole Attractions, and Hydrogen Bonds. More free lessons at: http://www.khanacademy.org/video?v=8qfzp

Covalent Networks, Metallic, and Ionic Crystals: Some of the strongest molecular structures. More free lessons at: http://www.khanacademy.org/video?v=Rw_pD

Vapor Pressure, Volatility, and Evaporation More free lessons at: http://www.khanacademy.org/video?v=hA5jd

Suspensions, Colloids and Solutions. The difference between Molarity and Molality. More free lessons at: http://www.khanacademy.org/video?v=3ROWX

Solubility of salt and gas solutes in liquid solvent. More free lessons at: http://www.khanacademy.org/video?v=zjIVJ

Raising or lowering the boiling or freezing point of a solution by adding solute. More free lessons at: http://www.khanacademy.org/video?v=z9Lxd

Kinetics, activation energy, activated complex and catalysts. More free lessons at: http://www.khanacademy.org/video?v=__zy-

Equilibrium reactions and constants. More free lessons at: http://www.khanacademy.org/video?v=CGJjj

Correcting a mistake and learning a bit about ion size More free lessons at: http://www.khanacademy.org/video?v=HBi8x

A probabilistic look at how molecules react to develop the intuition behind the equilibrium constant formula. More free lessons at: http://www.khanacademy.org/video?v=ONBJo

A more concrete attempt at showing how the probabilities of molecules reacting is related to their concentration. More free lessons at: http://www.khanacademy.org/video?v=psLX0

Ignoring the solution or the solid state molecules when calculating the equilibrium constant. More free lessons at: http://www.khanacademy.org/video?v=TsXlT

Le Chatelier's Principle regarding the "stressing" of reactions in equilibrium More free lessons at: http://www.khanacademy.org/video?v=4-fEv

Autoionization of water into hydronium and hydroxide ions. pH, pOH, and pKa. More free lessons at: http://www.khanacademy.org/video?v=2q4vS

Arrhenius, Bronsted Lowry, and Lewis Acids and Bases. More free lessons at: http://www.khanacademy.org/video?v=vShCn

Calculating the pH or pOH of strong acids and bases. More free lessons at: http://www.khanacademy.org/video?v=tS2YJ

Calculating the pH of a weak acid More free lessons at: http://www.khanacademy.org/video?v=dencu

pH of .2 M of NH3 (weak base). More free lessons at: http://www.khanacademy.org/video?v=gDJtO

Introduction to conjugate acids and bases More free lessons at: http://www.khanacademy.org/video?v=0LM6w

The pKa and pKb relationship between conjugate acids and bases (both of which are weak). More free lessons at: http://www.khanacademy.org/video?v=3Gm4n

Buffers and the Hendersen-Hasselbalch equation More free lessons at: http://www.khanacademy.org/video?v=LJmFb

Strong acid titration and equivalence point More free lessons at: http://www.khanacademy.org/video?v=299o6

Equivalence point when titrating a weak acid More free lessons at: http://www.khanacademy.org/video?v=gbpc_

Making sure you fully understand titration curves More free lessons at: http://www.khanacademy.org/video?v=BBIGR

Oxidation and reduction. Oxidation states.

More practice calculating oxidation states

Correcting an error in the last video regarding hydrogen peroxide.

Oxidation reduction (or redox) reactions

Redox reactions to drive Galvanic Cells.

Alpha, Beta, Gamma Decay and Positron Emission More free lessons at: http://www.khanacademy.org/video?v=3koOw

Introduction to half-life More free lessons at: http://www.khanacademy.org/video?v=9REPn

Showing that N(t)=Ne^(-kt) describes the amount of a radioactive substance we have at time T. For students with background in Calculus. Not necessary for intro chemistry class. More free lessons at ...

Introduction to Exponential Decay More free lessons at: http://www.khanacademy.org/video?v=HTDop

A few more examples of exponential decay. More free lessons at: http://www.khanacademy.org/video?v=Hqzak

The difference between macrostates and microstates. Thermodynamic equilibrium. More free lessons at: http://www.khanacademy.org/video?v=5EU-y

Using theoretically quasi-static and/or reversible processes to stay pretty much at equilibrium. More free lessons at: http://www.khanacademy.org/video?v=lKq-1

First law of thermodynamic and Internal Energy More free lessons at: http://www.khanacademy.org/video?v=Xb05C

Getting more intuition of internal energy, heat, and work More free lessons at: http://www.khanacademy.org/video?v=aOSlX

How a system can do work by expanding More free lessons at: http://www.khanacademy.org/video?v=obeGV

Why work from expansion is the area under the curve of a PV-diagram More free lessons at: http://www.khanacademy.org/video?v=M5uOI

Conceptual proof that the internal energy of an ideal gas system is 3/2 PV. More free lessons at: http://www.khanacademy.org/video?v=qSFY7

Isothermic and Adiabatic processes. Calculating the work done by an isothermic process. Seeing that it is the same as the heat added. More free lessons at: http://www.khanacademy.org/video?v=iiFWo ...

Introduction to the Carnot Cycle and Carnot Heat Engine More free lessons at: http://www.khanacademy.org/video?v=aAfBS

Proof of the volume ratios in a Carnot Cycle More free lessons at: http://www.khanacademy.org/video?v=ixRtS

Prroof that S (or entropy) is a valid state variable. More free lessons at: http://www.khanacademy.org/video?v=sPz5R

Clarifying that the thermodynamic definition of Entropy requires a reversible system. More free lessons at: http://www.khanacademy.org/video?v=PFcGi

Long video explaining why entropy is a measure of the number of states a system can take on (mathy, but mind-blowing). More free lessons at: http://www.khanacademy.org/video?v=WLKEV

A discussion of what entropy is and what it isn't. More free lessons at: http://www.khanacademy.org/video?v=xJf6p

Maxwell's Demon: A thought experiment that seems to defy the 2nd Law of Thermodynamics More free lessons at: http://www.khanacademy.org/video?v=aKRDv

More clarification as to what entropy is and what entropy is not. More free lessons at: http://www.khanacademy.org/video?v=dFFzA

Definition of efficiency for a heat engine. Efficiency of a Carnot Engine. More free lessons at: http://www.khanacademy.org/video?v=M_5KY

Seeing how we can scale and or reverse a Carnot Engine (to make a refrigerator) More free lessons at: http://www.khanacademy.org/video?v=pQWwP

Proving that a Carnot Engine is the most efficient engine More free lessons at: http://www.khanacademy.org/video?v=LUoUb

Understanding why enthalpy can be viewed as "heat content" in a constant pressure system. More free lessons at: http://www.khanacademy.org/video?v=fucyI

Standard heat of formation or standard enthalpy change of formation. More free lessons at: http://www.khanacademy.org/video?v=PK_JX

Using Hess's Law and standard heats of formation to determine the enthalpy change for reactions More free lessons at: http://www.khanacademy.org/video?v=chXMp

Intuition behind why spontaneity is driven by enthalpy, entropy and temperature. Introduction to Gibbs free energy. More free lessons at: http://www.khanacademy.org/video?v=ViAmQ

Determining if a reaction is spontaneous by calculating the change in Gibbs Free Energy. More free lessons at: http://www.khanacademy.org/video?v=sG1ZA

More formal understanding of why a negative change in Gibbs Free Energy implies a spontaneous, irreversible reaction. More free lessons at: http://www.khanacademy.org/video?v=7aur5

A look at why the "proof" of the relation between changes in Gibbs Free Energy and Spontaneity is wrong in many textbooks. More free lessons at: http://www.khanacademy.org/video?v=yYbzJ

Figuring grams of reactants and product produced from reaction of phosphorous and chlorine More free lessons at: http://www.khanacademy.org/video?v=jFv6k

Stoichiometry Example Problem 2 More free lessons at: http://www.khanacademy.org/video?v=eQf_E

Limiting Reactant Example Problem 1

Empirical and Molecular Formulas from Stoichiometry More free lessons at: http://www.khanacademy.org/video?v=FycJ8

Example of Finding Reactant Empirical Formula More free lessons at: http://www.khanacademy.org/video?v=66ziU

Stoichiometry of a Reaction in Solution More free lessons at: http://www.khanacademy.org/video?v=EKZSw

Another Stoichiometry Example in a Solution More free lessons at: http://www.khanacademy.org/video?v=_qrQK

Molecular and Empirical Forumlas from Percent Composition. Example 2.9 from Kotz Chemistry book More free lessons at: http://www.khanacademy.org/video?v=_H009

Using acid-base titration to find mass of oxalic acid More free lessons at: http://www.khanacademy.org/video?v=XjFNm

Spectrophotometry, Transmittance, Absorbance and the Beer-Lambert Law More free lessons at: http://www.khanacademy.org/video?v=qbCZb

Spectrophotometry Example - Determining concentration based on absorbance More free lessons at: http://www.khanacademy.org/video?v=VqAa_
 

 

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