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Khan Academy
Chemistry
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1
Elements and Atoms
by Khan Academy
832,941 views
Learn more: http://www.khanacademy.org/video?v=IFKnq9QM6_A
How elements relate to atoms. The basics of how protons, electrons and neutrons make up an atom. -
2
Introduction to the atom
by Khan Academy
994,651 views
Learn more: http://www.khanacademy.org/video?v=1xSQlwWGT8M
The atom, proton, neutron and electron -
3
Orbitals
by Khan Academy
802,623 views
Learn more: http://www.khanacademy.org/video?v=yBrp8uvNAhI
An introduction to orbitals -
4
More on orbitals and electron configuration
by Khan Academy
525,906 views
Learn more: http://www.khanacademy.org/video?v=FmQoSenbtnU
More intuition on orbitals. Touching on electron configuration. -
5
Electron Configurations
by Khan Academy
617,084 views
Learn more: http://www.khanacademy.org/video?v=RJlEH5Jz80w
Introduction to using the periodic table to determine electron configurations -
6
Electron Configurations 2
by Khan Academy
316,802 views
Learn more: http://www.khanacademy.org/video?v=YURReI6OJsg
Figuring out configurations for the d-block elements -
7
Valence Electrons
by Khan Academy
503,568 views
Learn more: http://www.khanacademy.org/video?v=1TZA171yxY4
Looking at valence electrons to figure out reactivity -
8
Groups of the Periodic Table
by Khan Academy
519,264 views
Learn more: http://www.khanacademy.org/video?v=LDHg7Vgzses
Properties of alkali, alkaline earth and transition metals. Halogens and noble gases. -
9
Periodic Table Trends: Ionization Energy
by Khan Academy
475,117 views
Learn more: http://www.khanacademy.org/video?v=ywqg9PorTAw
What an ion is. Using the periodic table to understand how difficult it is to ionize an atom. -
10
Other Periodic Table Trends
by Khan Academy
280,895 views
Learn more: http://www.khanacademy.org/video?v=XMLd-O6PgVs
Electronegativity, metallic nature and atomic radius. -
11
Ionic, Covalent, and Metallic Bonds
by Khan Academy
682,037 views
Learn more: http://www.khanacademy.org/video?v=CGA8sRwqIFg
Introduction to ionic, covalent, polar covalent and metallic bonds. -
12
Molecular and Empirical Formulas
by Khan Academy
458,923 views
Learn more: http://www.khanacademy.org/video?v=gfBcM3uvWfs
Introduction to molecular and empirical formulas. Calculating molecular mass. -
13
The Mole and Avogadro's Number
by Khan Academy
636,025 views
Learn more: http://www.khanacademy.org/video?v=AsqEkF7hcII
Introduction to the idea of a mole as a number (vs. an animal) -
14
Formula from Mass Composition
by Khan Academy
276,163 views
Learn more: http://www.khanacademy.org/video?v=xatVrAh2U0E
Figuring out the empirical formula from a molecules mass composition -
15
Another mass composition problem
by Khan Academy
138,785 views
Learn more: http://www.khanacademy.org/video?v=sXOIIEZh6qg
Another exercise converting a mass composition to an empirical formula. -
16
Balancing Chemical Equations
by Khan Academy
1,126,740 views
Learn more: http://www.khanacademy.org/video?v=RnGu3xO2h74
The art of balancing equations in chemistry! -
17
Stoichiometry
by Khan Academy
545,963 views
Learn more: http://www.khanacademy.org/video?v=SjQG3rKSZUQ
Introduction to stoichiometry -
18
Stoichiometry: Limiting Reagent
by Khan Academy
485,741 views
Learn more: http://www.khanacademy.org/video?v=rESzyhPOJ7I
Stoichiometry problem where we have a limiting reagent! -
19
Ideal Gas Equation: PV=nRT
by Khan Academy
342,326 views
Learn more: http://www.khanacademy.org/video?v=WScwPIPqZa0
Intuition behind the ideal gas equation: PV=nRT. -
20
Ideal Gas Equation Example 1
by Khan Academy
208,490 views
Learn more: http://www.khanacademy.org/video?v=erjMiErRgSQ
Figuring out the number of moles of gas we have using the ideal gas equation: PV=nRT. -
21
Ideal Gas Equation Example 2
by Khan Academy
125,278 views
Learn more: http://www.khanacademy.org/video?v=GwoX_BemwHs
PV/T is a constant. Figuring out the volume of an ideal gas at standard temperature and pressure (STP). -
22
Ideal Gas Equation Example 3
by Khan Academy
83,805 views
Learn more: http://www.khanacademy.org/video?v=69V-60sga3M
Figuring out the mass of Oxygen we have. -
23
Ideal Gas Example 4
by Khan Academy
79,480 views
Learn more: http://www.khanacademy.org/video?v=Osl6HEDZZ-E
Figuring out the molar mass of a mystery molecule at STP. -
24
Partial Pressure
by Khan Academy
167,531 views
Learn more: http://www.khanacademy.org/video?v=d4bqNf37mBY
Figuring out the partial pressures of various gases in a container. -
25
States of Matter
by Khan Academy
220,491 views
Learn more: http://www.khanacademy.org/video?v=pKvo0XWZtjo
Introduction to the states or phases of matter. -
26
States of Matter Follow-Up
by Khan Academy
83,943 views
Learn more: http://www.khanacademy.org/video?v=WenwtcuqOj8
More on Plasma and Hydrogen bonds. -
27
Specific Heat, Heat of Fusion and Vaporization
by Khan Academy
213,535 views
Learn more: http://www.khanacademy.org/video?v=zz4KbvF_X-0
Specifict heat and phase changes: Calculating how much heat is needed to convert 200g of ice at -10C to 110 degree steam. -
28
Chilling Water Problem
by Khan Academy
68,836 views
Learn more: http://www.khanacademy.org/video?v=lsXcKgjg8Hs
How much ice at -10 degrees C is necessary to get 500g of water down to 0 degrees C? -
29
Phase Diagrams
by Khan Academy
158,775 views
Learn more: http://www.khanacademy.org/video?v=Qp87Z4m8R-w
Understanding and interpreting phase diagrams -
30
Van Der Waals Forces
by Khan Academy
261,670 views
Learn more: http://www.khanacademy.org/video?v=8qfzpJvsp04
Van Der Waals Forces: London Dispersion Forces, Dipole Attractions, and Hydrogen Bonds. -
31
Covalent Networks, Metallic, and Ionic Crystals
by Khan Academy
107,410 views
Learn more: http://www.khanacademy.org/video?v=Rw_pDVbnfQk
Covalent Networks, Metallic, and Ionic Crystals: Some of the strongest molecular structures. -
32
Vapor Pressure
by Khan Academy
149,706 views
Learn more: http://www.khanacademy.org/video?v=hA5jddDYcyg
Vapor Pressure, Volatility, and Evaporation -
33
Suspensions, Colloids and Solutions
by Khan Academy
155,902 views
Learn more: http://www.khanacademy.org/video?v=3ROWXs3jtQU
Suspensions, Colloids and Solutions. The difference between Molarity and Molality. -
34
Solubility
by Khan Academy
225,636 views
Learn more: http://www.khanacademy.org/video?v=zjIVJh4JLNo
Solubility of salt and gas solutes in liquid solvent. -
35
Boiling Point Elevation and Freezing Point Supression
by Khan Academy
121,702 views
Learn more: http://www.khanacademy.org/video?v=z9LxdqYntlU
Raising or lowering the boiling or freezing point of a solution by adding solute. -
36
Introduction to Kinetics
by Khan Academy
255,207 views
Learn more: http://www.khanacademy.org/video?v=__zy-oOLPug
Kinetics, activation energy, activated complex and catalysts. -
37
Reactions in Equilibrium
by Khan Academy
270,154 views
Learn more: http://www.khanacademy.org/video?v=CGJjjm7-DJ4
Equilibrium reactions and constants. -
38
Mini-Video on Ion Size
by Khan Academy
62,895 views
Learn more: http://www.khanacademy.org/video?v=HBi8xjMchZc
Correcting a mistake and learning a bit about ion size -
39
Keq Intuition (mathy and not necessary to progress)
by Khan Academy
78,843 views
Learn more: http://www.khanacademy.org/video?v=ONBJo7dXJm8
A probabilistic look at how molecules react to develop the intuition behind the equilibrium constant formula. -
40
Keq derivation intuition (can skip; bit mathy)
by Khan Academy
44,740 views
Learn more: http://www.khanacademy.org/video?v=psLX080RQR8
A more concrete attempt at showing how the probabilities of molecules reacting is related to their concentration. -
41
Heterogenous Equilibrium
by Khan Academy
88,994 views
Learn more: http://www.khanacademy.org/video?v=TsXlTWgyItw
Ignoring the solution or the solid state molecules when calculating the equilibrium constant. -
42
Le Chatelier's Principle
by Khan Academy
321,940 views
Learn more: http://www.khanacademy.org/video?v=4-fEvpVNTlE
Le Chatelier's Principle regarding the "stressing" of reactions in equilibrium -
43
Introduction to pH, pOH, and pKw
by Khan Academy
238,607 views
Learn more: http://www.khanacademy.org/video?v=2q4vSKwaBtw
Autoionization of water into hydronium and hydroxide ions. pH, pOH, and pKa. -
44
Acid Base Introduction
by Khan Academy
510,210 views
Learn more: http://www.khanacademy.org/video?v=vShCnTY1-T0
Arrhenius, Bronsted Lowry, and Lewis Acids and Bases. -
45
pH, pOH of Strong Acids and Bases
by Khan Academy
258,433 views
Learn more: http://www.khanacademy.org/video?v=tS2YJPmKOFQ
Calculating the pH or pOH of strong acids and bases. -
46
pH of a Weak Acid
by Khan Academy
164,774 views
Learn more: http://www.khanacademy.org/video?v=dencuBNp_Ck
Calculating the pH of a weak acid -
47
pH of a Weak Base
by Khan Academy
83,453 views
Learn more: http://www.khanacademy.org/video?v=gDJtOIxDu78
pH of .2 M of NH3 (weak base). -
48
Conjugate Acids and Bases
by Khan Academy
206,949 views
Learn more: http://www.khanacademy.org/video?v=0LM6wPpypxM
Introduction to conjugate acids and bases -
49
pKa and pKb Relationship
by Khan Academy
153,242 views
Learn more: http://www.khanacademy.org/video?v=3Gm4nAAc3zc
The pKa and pKb relationship between conjugate acids and bases (both of which are weak). -
50
Buffers and Hendersen-Hasselbalch
by Khan Academy
179,143 views
Learn more: http://www.khanacademy.org/video?v=LJmFbcaxDPE
Buffers and the Hendersen-Hasselbalch equation -
51
Strong Acid Titration
by Khan Academy
143,263 views
Learn more: http://www.khanacademy.org/video?v=299o6c-Fkz4
Strong acid titration and equivalence point -
52
Weak Acid Titration
by Khan Academy
102,826 views
Learn more: http://www.khanacademy.org/video?v=gbpc_JBG1F0
Equivalence point when titrating a weak acid -
53
Half Equivalence Point
by Khan Academy
75,929 views
Learn more: http://www.khanacademy.org/video?v=1u0PU2BcxKg
Figuring out the pKa of an unknown weak acid from the half equivalence point -
54
Titration Roundup
by Khan Academy
76,944 views
Learn more: http://www.khanacademy.org/video?v=BBIGR0RAMtY
Making sure you fully understand titration curves -
55
Introduction to Oxidation States
by Khan Academy
258,301 views
Learn more: http://www.khanacademy.org/video?v=_fNNQfGGYr4
Oxidation and reduction. Oxidation states. -
56
More on Oxidation States
by Khan Academy
119,734 views
Learn more: http://www.khanacademy.org/video?v=GA88JI4AymY
More practice calculating oxidation states -
57
Hydrogen Peroxide Correction
by Khan Academy
48,802 views
Learn more: http://www.khanacademy.org/video?v=YPjtG5PA-iY
Correcting an error in the last video regarding hydrogen peroxide. -
58
Redox Reactions
by Khan Academy
422,234 views
Learn more: http://www.khanacademy.org/video?v=yp60-oVxrT4
Oxidation reduction (or redox) reactions -
59
Galvanic Cells
by Khan Academy
181,720 views
Learn more: http://www.khanacademy.org/video?v=N4L3dDIixSU
Redox reactions to drive Galvanic Cells. -
60
Types of Decay
by Khan Academy
152,927 views
Learn more: http://www.khanacademy.org/video?v=3koOwozY4oc
Alpha, Beta, Gamma Decay and Positron Emission -
61
Half-Life
by Khan Academy
141,886 views
Learn more: http://www.khanacademy.org/video?v=9REPnibO4IQ
Introduction to half-life -
62
Exponential Decay Formula Proof (can skip, involves Calculus)
by Khan Academy
46,621 views
Learn more: http://www.khanacademy.org/video?v=H7nrVDV8ahc
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. -
63
Introduction to Exponential Decay
by Khan Academy
56,185 views
Learn more: http://www.khanacademy.org/video?v=HTDop6eEsaA
Introduction to Exponential Decay -
64
More Exponential Decay Examples
by Khan Academy
29,323 views
Learn more: http://www.khanacademy.org/video?v=Hqzakjo_dYg
A few more examples of exponential decay. -
65
Macrostates and Microstates
by Khan Academy
45,827 views
Learn more: http://www.khanacademy.org/video?v=5EU-y1VF7g4
The difference between macrostates and microstates. Thermodynamic equilibrium. -
66
Quasistatic and Reversible Processes
by Khan Academy
44,238 views
Learn more: http://www.khanacademy.org/video?v=lKq-10ysDb4
Using theoretically quasi-static and/or reversible processes to stay pretty much at equilibrium. -
67
First Law of Thermodynamics/ Internal Energy
by Khan Academy
396,274 views
Learn more: http://www.khanacademy.org/video?v=Xb05CaG7TsQ
First law of thermodynamic and Internal Energy -
68
More on Internal Energy
by Khan Academy
92,296 views
Learn more: http://www.khanacademy.org/video?v=aOSlXuDO4UU
Getting more intuition of internal energy, heat, and work -
69
Work from Expansion
by Khan Academy
64,924 views
Learn more: http://www.khanacademy.org/video?v=obeGVTOZyfE
How a system can do work by expanding -
70
PV-diagrams and Expansion Work
by Khan Academy
78,851 views
Learn more: http://www.khanacademy.org/video?v=M5uOIy-JTmo
Why work from expansion is the area under the curve of a PV-diagram -
71
Proof: U=(3/2)PV or U=(3/2)nRT
by Khan Academy
42,955 views
Learn more: http://www.khanacademy.org/video?v=qSFY7GKhSRs
Conceptual proof that the internal energy of an ideal gas system is 3/2 PV. -
72
Work Done by Isothermic Process
by Khan Academy
77,333 views
Learn more: http://www.khanacademy.org/video?v=iiFWoXQPOJc
Isothermic and Adiabatic processes. Calculating the work done by an isothermic process. Seeing that it is the same as the heat added. -
73
Carnot Cycle and Carnot Engine
by Khan Academy
134,733 views
Learn more: http://www.khanacademy.org/video?v=aAfBSJObd6Y
Introduction to the Carnot Cycle and Carnot Heat Engine -
74
Proof: Volume Ratios in a Carnot Cycle
by Khan Academy
29,227 views
Learn more: http://www.khanacademy.org/video?v=ixRtSV3CXPA
Proof of the volume ratios in a Carnot Cycle -
75
Proof: S (or Entropy) is a valid state variable
by Khan Academy
48,555 views
Learn more: http://www.khanacademy.org/video?v=sPz5RrFus1Q
Prroof that S (or entropy) is a valid state variable. -
76
Thermodynamic Entropy Definition Clarification
by Khan Academy
153,693 views
Learn more: http://www.khanacademy.org/video?v=PFcGiMLwjeY
Clarifying that the thermodynamic definition of Entropy requires a reversible system. -
77
Reconciling Thermodynamic and State Definitions of Entropy
by Khan Academy
48,704 views
Learn more: http://www.khanacademy.org/video?v=WLKEVfLFau4
Long video explaining why entropy is a measure of the number of states a system can take on (mathy, but mind-blowing). -
78
Entropy Intuition
by Khan Academy
148,489 views
Learn more: http://www.khanacademy.org/video?v=xJf6pHqLzs0
A discussion of what entropy is and what it isn't. -
79
Maxwell's Demon
by Khan Academy
65,294 views
Learn more: http://www.khanacademy.org/video?v=aKRDvSZ-igA
Maxwell's Demon: A thought experiment that seems to defy the 2nd Law of Thermodynamics -
80
More on Entropy
by Khan Academy
43,864 views
Learn more: http://www.khanacademy.org/video?v=dFFzAP2OZ3E
More clarification as to what entropy is and what entropy is not. -
81
Efficiency of a Carnot Engine
by Khan Academy
43,256 views
Learn more: http://www.khanacademy.org/video?v=M_5KYncYNyc
Definition of efficiency for a heat engine. Efficiency of a Carnot Engine. -
82
Carnot Efficiency 2: Reversing the Cycle
by Khan Academy
22,417 views
Learn more: http://www.khanacademy.org/video?v=pQWwP7YYH6o
Seeing how we can scale and or reverse a Carnot Engine (to make a refrigerator) -
83
Carnot Efficiency 3: Proving that it is the most efficient
by Khan Academy
19,133 views
Learn more: http://www.khanacademy.org/video?v=LUoUb4hGMH8
Proving that a Carnot Engine is the most efficient engine -
84
Enthalpy
by Khan Academy
337,001 views
Learn more: http://www.khanacademy.org/video?v=fucyI7Ouj2c
Understanding why enthalpy can be viewed as "heat content" in a constant pressure system. -
85
Heat of Formation
by Khan Academy
107,851 views
Learn more: http://www.khanacademy.org/video?v=PK_JXzYcme0
Standard heat of formation or standard enthalpy change of formation. -
86
Hess's Law and Reaction Enthalpy Change
by Khan Academy
195,339 views
Learn more: http://www.khanacademy.org/video?v=chXMpDwjBDk
Using Hess's Law and standard heats of formation to determine the enthalpy change for reactions -
87
Gibbs Free Energy and Spontaneity
by Khan Academy
144,316 views
Learn more: http://www.khanacademy.org/video?v=ViAmQivKif0
Intuition behind why spontaneity is driven by enthalpy, entropy and temperature. Introduction to Gibbs free energy. -
88
Gibbs Free Energy Example
by Khan Academy
76,919 views
Learn more: http://www.khanacademy.org/video?v=sG1ZAdYi13A
Determining if a reaction is spontaneous by calculating the change in Gibbs Free Energy. -
89
More rigorous Gibbs Free Energy/ Spontaneity Relationship
by Khan Academy
35,680 views
Learn more: http://www.khanacademy.org/video?v=7aur5h44pV4
More formal understanding of why a negative change in Gibbs Free Energy implies a spontaneous, irreversible reaction. -
90
A look at a seductive but wrong Gibbs/Spontaneity Proof
by Khan Academy
16,996 views
Learn more: http://www.khanacademy.org/video?v=yYbzJs6vgv8
A look at why the "proof" of the relation between changes in Gibbs Free Energy and Spontaneity is wrong in many textbooks. -
91
Stoichiometry Example Problem 1
by Khan Academy
98,140 views
Learn more: http://www.khanacademy.org/video?v=jFv6k2OV7IU
Figuring grams of reactants and product produced from reaction of phosphorous and chlorine -
92
Stoichiometry Example Problem 2
by Khan Academy
75,872 views
Learn more: http://www.khanacademy.org/video?v=eQf_EAYGo-k
Stoichiometry Example Problem 2 -
93
Limiting Reactant Example Problem 1
by Khan Academy
89,325 views
Limiting Reactant Example Problem 1
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94
Empirical and Molecular Formulas from Stoichiometry
by Khan Academy
39,281 views
Learn more: http://www.khanacademy.org/video?v=FycJ8X67xEU
Empirical and Molecular Formulas from Stoichiometry -
95
Example of Finding Reactant Empirical Formula
by Khan Academy
17,094 views
Learn more: http://www.khanacademy.org/video?v=66ziUq6vRko
Example of Finding Reactant Empirical Formula -
96
Stoichiometry of a Reaction in Solution
by Khan Academy
46,885 views
Learn more: http://www.khanacademy.org/video?v=EKZSwjVR594
Stoichiometry of a Reaction in Solution -
97
Another Stoichiometry Example in a Solution
by Khan Academy
24,082 views
Learn more: http://www.khanacademy.org/video?v=_qrQKBB2jt8
Another Stoichiometry Example in a Solution -
98
Molecular and Empirical Forumlas from Percent Composition
by Khan Academy
77,140 views
Learn more: http://www.khanacademy.org/video?v=_H009sTvYE0
Molecular and Empirical Forumlas from Percent Composition. Example 2.9 from Kotz Chemistry book -
99
Acid Base Titration
by Khan Academy
98,118 views
Learn more: http://www.khanacademy.org/video?v=XjFNmfLv9_Q
Using acid-base titration to find mass of oxalic acid -
100
Spectrophotometry Introduction
by Khan Academy
120,322 views
Learn more: http://www.khanacademy.org/video?v=qbCZbP6_j48
Spectrophotometry, Transmittance, Absorbance and the Beer-Lambert Law -
101
Spectrophotometry Example
by Khan Academy
44,429 views
Learn more: http://www.khanacademy.org/video?v=VqAa_cmZ7OY
Spectrophotometry Example - Determining concentration based on absorbance -
102
Hess's Law Example
by Khan Academy
68,815 views
Learn more: http://www.khanacademy.org/video?v=8bCL8TQZFKo
Hess's Law Example -
103
Vapor Pressure Example
by Khan Academy
44,672 views
Learn more: http://www.khanacademy.org/video?v=-QpkmwIoMaY
Vapor pressure example using the Ideal Gas Law -
104
Change of State Example
by Khan Academy
29,751 views
Learn more: http://www.khanacademy.org/video?v=tvO0358YUYM
Specific Heat Capacity and Enthalpy of Vaporization example
