AP®︎ Chemistry Unit 4: Notes & Study Guide

Prepare for your quiz, test, or the AP exam with a comprehensive review on Unit 4 of AP Chemistry – Chemical Reactions.

Exam weight: 7%–9%
9 Topics

Unit 4: Chemical Reactions

How to identify, balance, and classify chemical reactions, and how to use stoichiometry to predict quantities.

Begin with Topic 4.1: Introduction for Reaction...

To review Unit 4, go through each of the 9 topics below.

Everything you actually need to know for your Unit 4 test, pulled directly from the AP® Chemistry curriculum.

Topic 4.1
~7 min
Review
Introduction for Reactions
Introduction for Reactions
  • Physical Changes vs Chemical Changes
  • What a Chemical Reaction Is
  • How to Read a Chemical Equation
Review
Topic 4.2
~6 min
Review
Net Ionic Equations
Net Ionic Equations
  • What a Net Ionic Equation Is
  • The Three Forms of a Reaction
  • Reactions in Aqueous Solution
Review
Topic 4.3
~7 min
Review
Representations of Reactions
Representations of Reactions
  • Chemical Equations as Particle Accounting
  • Types of Reaction Representations
  • How to Balance Chemical Equations
Review
Topic 4.4
~5 min
Review
Physical and Chemical Changes
Physical and Chemical Changes
  • What Makes a Change Chemical vs Physical
  • Chemical Processes
  • Physical Processes
Review
Topic 4.5
~6 min
Review
Stoichiometry
Stoichiometry
  • Stoichiometry and Why It Works
  • Mole Ratios and What They Represent
  • The Stoichiometry Roadmap
Review
Topic 4.6
~6 min
Review
Introduction to Titration
Introduction to Titration
  • What a Titration Is
  • Types of Titrations
  • Equivalence Point vs Endpoint
Review
Topic 4.7
~6 min
Review
Types of Chemical Reactions
Types of Chemical Reactions
  • The Three Reaction Types You Must Be Able to Identify
  • Assigning Oxidation Numbers to Identify Redox
  • How to Recognize a Precipitation Reaction Quickly
Review
Topic 4.8
~6 min
Review
Introduction to Acid-Base Reactions
Introduction to Acid-Base Reactions
  • Brønsted–Lowry Acid–Base Reactions
  • The Role of Water in Acid–Base Reactions
  • Strength of Acids and Bases and Conjugate Pairs
Review
Topic 4.9
~5 min
Review
Oxidation-Reduction (Redox) Reactions
Oxidation-Reduction (Redox) Reactions
  • What Redox Reactions Are
  • Assigning Oxidation Numbers
  • The Half-Reaction Method
Review

Notes

1 credit used · 5/5 remaining