# Chemistry - in-depth

#### Study the substances that form the various matters in the world. Investigate the properties and reactions the different substances and delve into the processes required to form new substances. Created by Khan Academy.

###### Average Course Length

30 hours

###### Skill Level

Intermediate

##### Pick a lesson

1: Elements and Atoms

2: Introduction to the atom

3: Orbitals

4: More on orbitals and electron configuration

5: Electron Configurations

6: Electron Configurations 2

7: Valence Electrons

8: Groups of the Periodic Table

9: Periodic Table Trends: Ionization Energy

10: Other Periodic Table Trends

11: Ionic, Covalent, and Metallic Bonds

12: Molecular and Empirical Formulas

13: The Mole and Avogadro's Number

14: Formula from Mass Composition

15: Another mass composition problem

16: Balancing Chemical Equations

17: Stoichiometry

18: Stoichiometry: Limiting Reagent

19: Ideal Gas Equation: PV=nRT

20: Ideal Gas Equation Example 1

21: Ideal Gas Equation Example 2

22: Ideal Gas Equation Example 3

23: Ideal Gas Example 4

24: Partial Pressure

25: States of Matter

26: States of Matter Follow-Up

27: Specific Heat, Heat of Fusion and Vaporization

28: Chilling Water Problem

29: Phase Diagrams

30: Van Der Waals Forces

31: Covalent Networks, Metallic, and Ionic Crystals

32: Vapor Pressure

33: Suspensions, Colloids and Solutions

34: Solubility

35: Boiling Point Elevation and Freezing Point Supression

36: Introduction to Kinetics

37: Reactions in Equilibrium

38: Mini-Video on Ion Size

39: Keq Intuition (mathy and not necessary to progress)

40: Keq derivation intuition (can skip; bit mathy)

41: Heterogenous Equilibrium

42: Le Chatelier's Principle

43: Introduction to pH, pOH, and pKw

44: Acid Base Introduction

45: pH, pOH of Strong Acids and Bases

46: pH of a Weak Acid

47: pH of a Weak Base

48: Conjugate Acids and Bases

49: pKa and pKb Relationship

50: Buffers and Hendersen-Hasselbalch

51: Strong Acid Titration

52: Weak Acid Titration

53: Private video

54: Titration Roundup

55: Introduction to Oxidation States

56: More on Oxidation States

57: Hydrogen Peroxide Correction

58: Redox Reactions

59: Galvanic Cells

60: Types of Decay

61: Half-Life

62: Exponential Decay Formula Proof (can skip, involves Calculus)

63: Introduction to Exponential Decay

64: More Exponential Decay Examples

65: Macrostates and Microstates

66: Quasistatic and Reversible Processes

67: First Law of Thermodynamics/ Internal Energy

68: More on Internal Energy

69: Work from Expansion

70: PV-diagrams and Expansion Work

71: Proof: U=(3/2)PV or U=(3/2)nRT

72: Work Done by Isothermic Process

73: Carnot Cycle and Carnot Engine

74: Proof: Volume Ratios in a Carnot Cycle

75: Proof: S (or Entropy) is a valid state variable

76: Thermodynamic Entropy Definition Clarification

77: Reconciling Thermodynamic and State Definitions of Entropy

78: Entropy Intuition

79: Maxwell's Demon

80: More on Entropy

81: Efficiency of a Carnot Engine

82: Carnot Efficiency 2: Reversing the Cycle

83: Carnot Efficiency 3: Proving that it is the most efficient

84: Enthalpy

85: Heat of Formation

86: Hess's Law and Reaction Enthalpy Change

87: Gibbs Free Energy and Spontaneity

88: Gibbs Free Energy Example

89: More rigorous Gibbs Free Energy/ Spontaneity Relationship

90: A look at a seductive but wrong Gibbs/Spontaneity Proof

91: Stoichiometry Example Problem 1

92: Stoichiometry Example Problem 2

93: Limiting Reactant Example Problem 1

94: Empirical and Molecular Formulas from Stoichiometry

95: Example of Finding Reactant Empirical Formula

96: Stoichiometry of a Reaction in Solution

97: Another Stoichiometry Example in a Solution

98: Molecular and Empirical Forumlas from Percent Composition

99: Acid Base Titration

100: Spectrophotometry Introduction

101: Spectrophotometry Example

102: Hess's Law Example

103: Vapor Pressure Example

104: Change of State Example