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

Solution: Given the overall redox reaction: Fe2+(aq) + Ce4+(aq) → Fe3+(aq) + Ce3+(aq)  Identify the two half-reactions. Oxidation half-reaction                          Reduction half-reactionA) Fe 2+(aq) → Fe 3+(aq) + e−              Ce 4+(aq) + e − → Ce 3+(aq)B) Ce 4+(aq) + e − → Ce 3+(aq)           Fe 2+(aq) → Fe 3+(aq) + e −C) Fe 2+(aq) + e − → Fe 3+(aq)           Ce 4+(aq) → Ce 3+(aq) + e −D) Ce 4+(aq) → Ce 3+(aq) + e −           Fe 2+(aq) + e − → Fe 3+(aq)E) Fe 3+(aq) →Fe 2+(aq) + e −              Ce 4+(aq) → Ce 3+ (aq) + e −

Problem

Given the overall redox reaction: Fe2+(aq) + Ce4+(aq) → Fe3+(aq) + Ce3+(aq)  

Identify the two half-reactions.

 

Oxidation half-reaction                          Reduction half-reaction

A) Fe 2+(aq) → Fe 3+(aq) + e−              Ce 4+(aq) + e  → Ce 3+(aq)

B) Ce 4+(aq) + e  → Ce 3+(aq)           Fe 2+(aq) → Fe 3+(aq) + e 

C) Fe 2+(aq) + e  → Fe 3+(aq)           Ce 4+(aq) → Ce 3+(aq) + e 

D) Ce 4+(aq) → Ce 3+(aq) + e            Fe 2+(aq) + e  → Fe 3+(aq)

E) Fe 3+(aq) →Fe 2+(aq) + e −              Ce 4+(aq) → Ce 3+ (aq) + e