Ch.4 - Chemical Quantities & Aqueous ReactionsWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds
Solubility Rules
Molecular Equations
Gas Evolution Equations
Solution Stoichiometry
Complete Ionic Equations
Calculate Oxidation Numbers
Redox Reactions
Balancing Redox Reactions: Acidic Solutions
Balancing Redox Reactions: Basic Solutions
Activity Series
Additional Practice
Types of Chemical Reactions
Normality & Equivalent Weight
Additional Guides
Oxidation Reduction (Redox) Reactions
Oxidation Number
Net Ionic Equation

Balancing Redox Reactions requires a new approach that accounts for the transfer of electrons between reactants.

Balancing Acidic Redox Reactions

Concept #1: Balancing Redox Reactions: Acidic Solutions

Acidic Redox Reactions generally have the presence of an H+ ion. 

Example #1: Identify the half reactions from the following redox reaction.

Example #2: Balance the following redox reaction if it is found to be in an acidic solution.

Practice: Balance the following redox reaction in an acidic solution.

Cl2 (g) + S2O32- (aq) → Cl- (aq) + SO42- (aq)

Practice: What is the coefficient of Fe3+ when the following reaction is balanced?

Bi3+ (aq) + Fe3+ (aq) + H2O (l) → BiO3(aq) + Fe2+ (aq) + H+ (aq)