# Chemistry - Khan Academy

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

## Lessons hide description |
---|

## 1) Elements and Atoms## 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 |

## 2) Introduction to the atom## The atom, proton, neutron and electron More free lessons at: http://www.khanacademy.org/video?v=1xSQl |

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

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

## 5) Electron Configurations## Introduction to using the periodic table to determine electron configurations |

## 6) Electron Configurations 2## Figuring out configurations for the d-block elements More free lessons at: http://www.khanacademy.org/video?v=YURRe |

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

## 8) Groups of the Periodic Table## Properties of alkali, alkaline earth and transition metals. Halogens and noble gases. More free lessons at: http://www.khanacademy.org/video?v=LDHg7 |

## 9) Periodic Table Trends: Ionization Energy## 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 |

## 10) Other Periodic Table Trends## Electronegativity, metallic nature and atomic radius. |

## 11) Ionic, Covalent, and Metallic Bonds## Introduction to ionic, covalent, polar covalent and metallic bonds. More free lessons at: http://www.khanacademy.org/video?v=CGA8s |

## 12) Molecular and Empirical Formulas## Introduction to molecular and empirical formulas. Calculating molecular mass. More free lessons at: http://www.khanacademy.org/video?v=gfBcM |

## 13) The Mole and Avogadro's Number## Introduction to the idea of a mole as a number (vs. an animal) More free lessons at: http://www.khanacademy.org/video?v=AsqEk |

## 14) Formula from Mass Composition## Figuring out the empirical formula from a molecules mass composition |

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

## 16) Balancing Chemical Equations## The art of balancing equations in chemistry! More free lessons at: http://www.khanacademy.org/video?v=RnGu3 |

## 17) Stoichiometry## Introduction to stoichiometry More free lessons at: http://www.khanacademy.org/video?v=SjQG3 |

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

## 19) Ideal Gas Equation: PV=nRT## Intuition behind the ideal gas equation: PV=nRT. More free lessons at: http://www.khanacademy.org/video?v=WScwP |

## 20) Ideal Gas Equation Example 1## 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 |

## 21) Ideal Gas Equation Example 2## 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_ |

## 22) Ideal Gas Equation Example 3## Figuring out the mass of Oxygen we have. More free lessons at: http://www.khanacademy.org/video?v=69V-6 |

## 23) Ideal Gas Example 4## Figuring out the molar mass of a mystery molecule at STP. More free lessons at: http://www.khanacademy.org/video?v=Osl6H |

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

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

## 26) States of Matter Follow-Up## More on Plasma and Hydrogen bonds. More free lessons at: http://www.khanacademy.org/video?v=Wenwt |

## 27) Specific Heat, Heat of Fusion and Vaporization## 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 |

## 28) Chilling Water Problem## 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 |

## 29) Phase Diagrams## Understanding and interpreting phase diagrams More free lessons at: http://www.khanacademy.org/video?v=Qp87Z |

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

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

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

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

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

## 35) Boiling Point Elevation and Freezing Point Supression## 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 |

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

## 37) Reactions in Equilibrium## Equilibrium reactions and constants. More free lessons at: http://www.khanacademy.org/video?v=CGJjj |

## 38) Mini-Video on Ion Size## Correcting a mistake and learning a bit about ion size More free lessons at: http://www.khanacademy.org/video?v=HBi8x |

## 39) Keq Intuition (mathy and not necessary to progress)## 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 |

## 40) Keq derivation intuition (can skip; bit mathy)## 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 |

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

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

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

## 44) Acid Base Introduction## Arrhenius, Bronsted Lowry, and Lewis Acids and Bases. More free lessons at: http://www.khanacademy.org/video?v=vShCn |

## 45) pH, pOH of Strong Acids and Bases## Calculating the pH or pOH of strong acids and bases. More free lessons at: http://www.khanacademy.org/video?v=tS2YJ |

## 46) pH of a Weak Acid## Calculating the pH of a weak acid More free lessons at: http://www.khanacademy.org/video?v=dencu |

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

## 48) Conjugate Acids and Bases## Introduction to conjugate acids and bases More free lessons at: http://www.khanacademy.org/video?v=0LM6w |

## 49) pKa and pKb Relationship## 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 |

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

## 51) Strong Acid Titration## Strong acid titration and equivalence point More free lessons at: http://www.khanacademy.org/video?v=299o6 |

## 52) Weak Acid Titration## Equivalence point when titrating a weak acid More free lessons at: http://www.khanacademy.org/video?v=gbpc_ |

## 53) Titration Roundup## Making sure you fully understand titration curves More free lessons at: http://www.khanacademy.org/video?v=BBIGR |

## 54) Introduction to Oxidation States## Oxidation and reduction. Oxidation states. |

## 55) More on Oxidation States## More practice calculating oxidation states |

## 56) Hydrogen Peroxide Correction## Correcting an error in the last video regarding hydrogen peroxide. |

## 57) Redox Reactions## Oxidation reduction (or redox) reactions |

## 58) Galvanic Cells## Redox reactions to drive Galvanic Cells. |

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

## 60) Half-Life## Introduction to half-life More free lessons at: http://www.khanacademy.org/video?v=9REPn |

## 61) Exponential Decay Formula Proof (can skip, involves Calculus)## 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 ... |

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

## 63) More Exponential Decay Examples## A few more examples of exponential decay. More free lessons at: http://www.khanacademy.org/video?v=Hqzak |

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

## 65) Quasistatic and Reversible Processes## 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 |

## 66) First Law of Thermodynamics/ Internal Energy## First law of thermodynamic and Internal Energy More free lessons at: http://www.khanacademy.org/video?v=Xb05C |

## 67) More on Internal Energy## Getting more intuition of internal energy, heat, and work More free lessons at: http://www.khanacademy.org/video?v=aOSlX |

## 68) Work from Expansion## How a system can do work by expanding More free lessons at: http://www.khanacademy.org/video?v=obeGV |

## 69) PV-diagrams and Expansion Work## 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 |

## 70) Proof: U=(3/2)PV or U=(3/2)nRT## 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 |

## 71) Work Done by Isothermic Process## 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 ... |

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

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

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

## 75) Thermodynamic Entropy Definition Clarification## Clarifying that the thermodynamic definition of Entropy requires a reversible system. More free lessons at: http://www.khanacademy.org/video?v=PFcGi |

## 76) Reconciling Thermodynamic and State Definitions of Entropy## 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 |

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

## 78) Maxwell's Demon## 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 |

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

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

## 81) Carnot Efficiency 2: Reversing the Cycle## 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 |

## 82) Carnot Efficiency 3: Proving that it is the most efficient## Proving that a Carnot Engine is the most efficient engine More free lessons at: http://www.khanacademy.org/video?v=LUoUb |

## 83) Enthalpy## 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 |

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

## 85) Hess's Law and Reaction Enthalpy Change## 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 |

## 86) Gibbs Free Energy and Spontaneity## 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 |

## 87) Gibbs Free Energy Example## 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 |

## 88) More rigorous Gibbs Free Energy/ Spontaneity Relationship## 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 |

## 89) A look at a seductive but wrong Gibbs/Spontaneity Proof## 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 |

## 90) Stoichiometry Example Problem 1## Figuring grams of reactants and product produced from reaction of phosphorous and chlorine More free lessons at: http://www.khanacademy.org/video?v=jFv6k |

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

## 92) Limiting Reactant Example Problem 1## Limiting Reactant Example Problem 1 |

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

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

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

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

## 97) Molecular and Empirical Forumlas from Percent Composition## 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 |

## 98) Acid Base Titration## Using acid-base titration to find mass of oxalic acid More free lessons at: http://www.khanacademy.org/video?v=XjFNm |

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

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

####
**The Science of Biology**
4 lessons

High school Biology videos that I make for 10th grade Biology, 9th-10th grade Honors Biology, and Intro to the Human Body classes. Hope you find them helpful!

####
**Statistics - Khan Academy**
57 lessons

Introduction to statistics. Will eventually cover all of the major topics in a first-year statistics course (not there yet!) Probability and statistics on Khan Academy: We dare you to go through a

####
**Organic Chemistry - UCI**
127 lessons

51A: These videos are part of a 28-lecture undergraduate level course titled "Organic Chemistry" taught at UC Irvine by Professor James S. Nowick in fall 2009. This course covers topics such as bondin

####
**Physics - Khan Academy**
155 lessons

Projectile motion, mechanics and electricity and magnetism. Solid understanding of algebra and a basic understanding of trigonometry necessary.

####
**SAT Preparation - Khan Academy**
118 lessons

I am going to work through every problem in the College Board "Official SAT Study Guide." You should take the practice tests on your own, grade them and then use these videos to understand the problem

####
**Chemistry: Quantum Principles - UCI**
28 lessons

Description: This course provides an introduction to quantum mechanics and principles of quantum chemistry with applications to nuclear motions and the electronic structure of the hydrogen atom. It al

####
**Finance - Khan Academy**
195 lessons

Videos on finance and macroeconomics. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their

####
**Cell Biology : Anatomy and Physiology Lectures**
5 lessons

For the complete series as well as over 200 A&P videos, lecture notes, and interactive quizzes, please visit us at MrFordsClass.net. Almost all anatomy and physiology course have the student learn ho

####
**Geometry - Khan Academy**
113 lessons

Videos on geometry. Basic understanding of Algebra I necessary. After this, you'll be ready for Trigonometry. Geometry on Khan Academy: We are surrounded by space. And that space contains lots of t

####
**Chemistry - Khan Academy**
103 lessons

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

**TAG Cloud**

**Web Stats**

Active courses: 1,162

Lessons: 27,688

Data: 83 GB

Online: 188 users

News about new courses