Chemguy App and Online Course



  1. 1. Compounds and Reactions

Periodic Table


Ionic Compounds: Naming and Making

Polyatomic Ions in Compounds

How to Name Hydrates

Acid Naming

Composition Reactions


Single Replacement Reactions

Double Replacement

Hydrocarbon Combustion Equation Balancing

  1. 2. Stoichiometry

Introduction to the Mole Concept

Mole Calculations

Using Molar Mass

Isotopes 1

Isotopes 2

Calculating the Mass Percent of an Element in a Compound

Empirical Formulae

Mole to Mole Stoichiometry

Mole to Mass Stoichiometry

Mass to Mass Stoichiometry

Hydrate Stoichiometry

Question Involving Combustion Analysis

The Mass Spectrometer

  1. 3. Solutions


Calculating Concentration



Net Ionic Equations

Solution Stoichiometry

Molality, Mass Percent, Mole Fraction...

Colligative Properties

4. Gases

Introduction to Gases: Units of Measurement

Boyle’s Law

Charles’ Law

Avogadro’s Law and the Ideal Gas Law

Ideal Calculations

Partial Pressures

STP and SATP Defined and Calculations

Raoult’s Law

Kinetic Molecular Theory

Root MeanSquareVelocity

Graham’s Law of Effusion

5. Atomic Theory and Bonding

Atomic Models

Bohr Model of the Atom

Heisenberg Uncertainty Principle

Quantum Numbers

Assigning Q #’s


Electron Configurations 1

Electrons Configurations 2

Periodic Table Trends 1

Periodic Table Trends 2

Properties of Period 3 Elements

Trends for D Block Elements 1

Trends for D Block Elements 2

6. Bonding



Polarity or Dipole Moments

Born-Haber Cycle

Lattice Energy

Calculations Involving Bond Energy

Lewis Diagrams 1

Lewis Diagrams 2

Lewis Diagrams 3

Lewis Ions

Lewis Exceptions

Formal Charge 1

Formal Charge 2

7. Molecular Shapes

4 EP Shapes

3 EP Shapes

2 EP Shapes

5 EP Shapes

6 EP Shapes and Polarity

LDF and DD

Hydrogen Bonding

Bonding Comparisons

Phase Diagram for Carbon Dioxide

Phase Diagram for Water

sp3 Hybrids

sp2 Hybridization

sp Hydbridization

dsp3 and d2sp3

Molecular Orbitals

Energy Level Diagrams 1

Energy Level Diagrams 2

8. Energy

Energy Laws

Ep and Ek

3 Ek Types

q = mcT


Calculation of a Molar Heat Through Calorimetry 1

Calculation of a Molar Heat Through Calorimetry 2

Bomb Cal

Definition of Heat of Formation and Equations

Heat of Formation and Stoichiometry

Performing Hess’ Law Calculation 1

Performing Hess’ Law Calculation 2

Hess’ Short Cut

Exo Graph

Endo Graph

Hess’ Law Calculation with Ideal Gas Law

Energy STS Issues

9. Redox

Terminology for Electrochemistry

Writing Redox Rxns 2

Writing Redox Reactions 1

Oxidation Numbers 1

Continued Oxidation Number (State) Identification

Balancing Reactions With Oxidation Numbers 1

Balancing Reactions With Oxidation Numbers 2

Half-Rxn Method

Auto-Oxidation or Disproportionation

Hydrogen Standard

Voltaic Cells 1

Voltaic Cells 2

Voltaic Cells 3

Redox Titration

Electrolysis 1

Electrolysis 2

Molten Electrolysis

Calculation With Faraday’s Constant

Calculating a Molar Mass Using Faraday’s Law

Corrosion & Science and Technology Issues

Question Where You Devise a Redox Table

10. Equilibrium

Eqm Definition

K Relationships

Heterogeneous Equilibrium

Calculating K values

K and Ice Box


Calculating Concentrations at Equilibrium 1

Calculating Concentrations at Equilibrium 2

Calculating Q: Reactions with Initial Concentrations of all Species

Le Chatelier-Conc

Temperature Change and Le Chatelier’s Principle

Le Chat-Pressure

Equilibrium Shifting Question

Graphing Equilibrium Reactions

Ksp Intro

Calculating Molar Solubility

Relative Solubility

pH and Solubility

Common Ion Effect

Precipitation and [Eqm]

11. Acids and Bases

Properties of Acids and Bases

Definitions of Acids and Bases 1

A/B Definitions 2



SA & SB pH

More pH Calculations: Finding hydronium from pH


Calculating the pH of a Weak Base

B/L Reactions

A/B Stoich

INXS Stoich

SA/SB Titration

SB/WA Titration

Titration of a Polybasic Species


Buffer pH Calc

12. Organic

Definition and Formulae



Naming of a Large Alkane



Naming Cycloalkanes and Cycloalkenes





More Alcohol, Please!...

Carboxylic Acids

Sub and Add

Mechanism for Substitution Reactions


Combustion & Elimination Reactions

Polym & Cracking

Ketones and Aldehydes

Making K & A from Alcohol

Nitrogen Deriv’s

SN1 and SN2

Reaction Pathways 1

Rxn Pathways 2


13. Kinetics

Rate Factors

Defining Rate Laws

Differential RL

Rate Constants

Integrated Rate Law Question1

Integrated Rate Law Question 2

Calculation with Half-Life

Reaction Mechanisms

Intermediates & Catalysts

Finding Ea

14. Thermodynamics


Entropy Defined and Explained

ΔS Universe

Introduction to Gibbs Free Energy

Predicting Sign of ΔG

Entropy Driven Rxn

Finding Boiling Point Using ΔG

Finding ΔG in Various Ways

Finding G from ΔG

Free Energy and Calculating K

Free Energy and Voltaic Cells

Nernst Equation

15. Uncertainty


Absolute Uncertainty

Percent Uncertainty

Calorimetry Uncertainty