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Khan Academy Chemistry

Introduction to the Atom
Summary

Orbitals and Electrons
Summary

Periodic table, trends, and bonding
Summary

Chemical reactions (stoichiometry)
Summary

Ideal gas laws
Summary

States of matter
Summary

Reaction rates
Summary

Acids and bases
Summary

Oxidation reduction
Summary

Radioactive decay
Summary

Introduction to the Atom

Elements and Atoms
How elements relate to atoms. The basics of how protons, electrons and neutrons make up an atom.

Introduction to the atom
The atom, proton, neutron and electron

Orbitals and Electrons

Orbitals
An introduction to orbitals

More on orbitals and electron configuration
More intuition on orbitals. Touching on electron configuration.

Electron configurations
Introduction to using the periodic table to determine electron configurations

Electron configurations 2
Figuring out configurations for the d-block elements

Valence Electrons
Looking at valence electrons to figure out reactivity

Periodic table, trends, and bonding

Groups of the Periodic Table 
Properties of alkali, alkaline earth and transition metals. Halogens and noble gases.

Valence Electrons
Looking at valence electrons to figure out reactivity

Periodic Table Trends: Ionization Energy
What an ion is. Using the periodic table to understand how difficult it is to ionize an atom.

Other Periodic Table Trends
Electronegativity, metallic nature and atomic radius.

Ionic, Covalent, and Metallic Bonds 
Introduction to ionic, covalent, polar covalent and metallic bonds.

Chemical reactions (stoichiometry)

Molecular and Empirical Formulas
Introduction to molecular and empirical formulas. Calculating molecular mass.

The mole and avogadro's number
Introduction to the idea of a mole as a number (vs. an animal).

Formula from mass composition
Figuring out the empirical formula from a molecules mass composition.

Another mass composition problem
Another exercise converting a mass composition to an empirical formula.

Balancing chemical equations
The art of balancing equations in chemistry!

Stoichiometry
Introduction to stoichiometry.

Stoichiometry example problem 1
Figuring grams of reactants and product produced from reaction of phosphorous and chlorine.

Stoichiometry Example Problem 2 
Summary

Stoichiometry: Limiting reagent 
Stoichiometry problem where we have a limiting reagent! 

Limiting reactant example problem 1 
Limiting Reactant Example Problem 1 

Spectrophotometry Introduction
Spectrophotometry, Transmittance, Absorbance and the Beer-Lambert Law

Spectrophotometry Example
Spectrophotometry Example - Determining concentration based on absorbance

Ideal gas laws

Ideal Gas Equation: PV=nRT
Intuition behind the ideal gas equation: PV=nRT.

Ideal Gas Equation Example 1
Figuring out the number of moles of gas we have using the ideal gas equation: PV=nRT.

Ideal Gas Equation Example 2
PV/T is a constant. Figuring out the volume of an ideal gas at standard temperature and pressure (STP).

Ideal Gas Equation Example 3
Figuring out the mass of Oxygen we have.

Ideal Gas Equation Example 4
Figuring out the molar mass of a mystery molecule at STP.

Partial Pressure
Figuring out the partial pressures of various gases in a container.

Vapor Pressure Example
Vapor pressure example using the Ideal Gas Law

States of matter

States of Matter
Introduction to the states or phases of matter.

States of Matter Follow-Up
More on Plasma and Hydrogen bonds.

Specific Heat, Heat of Fusion and Vaporization
Specific heat and phase changes: Calculating how much heat is needed to convert 200g of ice at -10C to 110 degree steam.

Chilling Water Problem
How much ice at -10 degrees C is necessary to get 500g of water down to 0 degrees C?

Phase Diagrams
Understanding and interpreting phase diagrams

Van Der Waals Forces
Van Der Waals Forces: London Dispersion Forces, Dipole Attractions, and Hydrogen Bonds.

Covalent Networks, Metallic, and Ionic Crystals
Covalent Networks, Metallic, and Ionic Crystals: Some of the strongest molecular structures.

Vapor Pressure
Vapor Pressure, Volatility, and Evaporation

Suspensions, Colloids and Solutions
Suspensions, Colloids and Solutions. The difference between Molarity and Molality.

Solubility
Solubility of salt and gas solutes in liquid solvent.

Boiling Point Elevation and Freezing Point Suppression
Raising or lowering the boiling or freezing point of a solution by adding solute.

Change of State Example
Specific Heat Capacity and Enthalpy of Vaporization example

Reaction rates

Introduction to Kinetics
Kinetics, activation energy, activated complex and catalysts.

Reactions in Equilibrium
Equilibrium reactions and constants.

Mini-Video on Ion Size 
Correcting a mistake and learning a bit about ion size

Keq Intuition (mathy and not necessary to progress)
A probabilistic look at how molecules react to develop the intuition behind the equilibrium constant formula.

Keq derivation intuition (can skip; bit mathy)
A more concrete attempt at showing how the probabilities of molecules reacting is related to their concentration.

Heterogeneous Equilibrium
Ignoring the solution or the solid state molecules when calculating the equilibrium constant.

Le Chatelier's Principle
Le Chatelier's Principle regarding the "stressing" of reactions in equilibrium

Introduction to pH, pOH, and pKw
Autoionization of water into hydronium and hydroxide ions. pH, pOH, and pKa.

Acids and bases

Acid Base Introduction
Arrhenius, Bronsted Lowry, and Lewis Acids and Bases.

pH, pOH of Strong Acids and Bases
Calculating the pH or pOH of strong acids and bases.

pH of a Weak Acid
Calculating the pH of a weak acid

pH of a Weak Base
pH of .2 M of NH3 (weak base).

Conjugate Acids and Bases
Introduction to conjugate acids and bases

pKa and pKb Relationship
The pKa and pKb relationship between conjugate acids and bases (both of which are weak).

Buffers and Hendersen-Hasselbalch
Buffers and the Hendersen-Hasselbalch equation

Strong Acid Titration
Strong acid titration and equivalence point

Weak Acid Titration
Equivalence point when titrating a weak acid

Half Equivalence Point
Figuring out the pKa of an unknown weak acid from the half equivalence point

Titration Roundup
Making sure you fully understand titration curves

Acid Base Titration
Using acid-base titration to find mass of oxalic acid

Oxidation reduction

Introduction to Oxidation States
Oxidation and reduction. Oxidation states.

More on Oxidation States
More practice calculating oxidation states

Hydrogen Peroxide Correction
Correcting an error in the last video regarding hydrogen peroxide.

Redox Reactions
Oxidation reduction (or redox) reactions

Galvanic Cells
Redox reactions to drive Galvanic Cells.

Radioactive decay

Types of Decay
Alpha, Beta, Gamma Decay and Positron Emission

Half-Life
Introduction to half-life

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.

Introduction to Exponential Decay
Introduction to Exponential Decay

More Exponential Decay Examples
A few more examples of exponential decay.

Elements and Atoms

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Introduction to the atom

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Orbitals

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More on orbitals and electron configuration

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Electron configurations

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Electron configurations 2

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Valence Electrons

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Groups of the Periodic Table 

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Valence Electrons

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Periodic Table Trends: Ionization Energy

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Other Periodic Table Trends

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Ionic, Covalent, and Metallic Bonds 

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Molecular and Empirical Formulas

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The mole and avogadro's number

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Formula from mass composition

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Another mass composition problem

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Balancing chemical equations

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Stoichiometry

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Stoichiometry example problem 1

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Stoichiometry Example Problem 2 

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Stoichiometry: Limiting reagent 

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Limiting reactant example problem 1 

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Spectrophotometry Introduction

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Spectrophotometry Example

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Ideal Gas Equation: PV=nRT

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Ideal Gas Equation Example 1

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Ideal Gas Equation Example 2

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Ideal Gas Equation Example 3

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Ideal Gas Equation Example 4

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Partial Pressure

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Vapor Pressure Example

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States of Matter

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States of Matter Follow-Up

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Specific Heat, Heat of Fusion and Vaporization

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Chilling Water Problem

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Phase Diagrams

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Van Der Waals Forces

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Covalent Networks, Metallic, and Ionic Crystals

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Vapor Pressure

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Suspensions, Colloids and Solutions

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Solubility

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Boiling Point Elevation and Freezing Point Suppression

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Change of State Example

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Introduction to Kinetics

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Reactions in Equilibrium

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Mini-Video on Ion Size 

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Keq Intuition (mathy and not necessary to progress)

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Keq derivation intuition (can skip; bit mathy)

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Heterogeneous Equilibrium

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Le Chatelier's Principle

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Introduction to pH, pOH, and pKw

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Acid Base Introduction

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pH, pOH of Strong Acids and Bases

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pH of a Weak Acid

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pH of a Weak Base

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Conjugate Acids and Bases

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pKa and pKb Relationship

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Buffers and Hendersen-Hasselbalch

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Strong Acid Titration

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Weak Acid Titration

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Half Equivalence Point

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Titration Roundup

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Acid Base Titration

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Introduction to Oxidation States

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More on Oxidation States

Content

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Hydrogen Peroxide Correction

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Redox Reactions

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Galvanic Cells

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Types of Decay

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Half-Life

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Exponential Decay Formula Proof (can skip, involves Calculus)

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Introduction to Exponential Decay

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More Exponential Decay Examples

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