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
Sections
Solutions
Molarity
Osmolarity
Dilutions
Solubility Rules
Electrolytes
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

Redox Reactions (oxidation-reduction reactions) involve transference of an electron(s) between reactants.

Oxidation-Reduction Reactions

Concept #1: Redox Reactions

To remember the difference between oxidation and reduction just learn: LEO the lion goes GER

Concept #2: Redox Reactions

Example #1: Which reactant is undergoing oxidation and which reactant is undergoing reduction?

Practice: Which element is being reduced in the following reaction? 

Cr2O72- + 3 HNO2 + 5 H→ 2 Cr3+ +  3NO3- + 4 H2O

Practice: Identify the oxidizing agent and reducing agent from the following redox reaction. 

Ba (s) + Cl2 (g) → BaCl2 (aq)

Practice: Which element is oxidized and which is reduced in the following reaction?

Hg (aq) + HgCl2 (aq) → Hg2Cl2

Practice: Which of the following represents an oxidation-reduction reaction? 

I. PCl3 (aq) + Cl2 (g) → PCl5 (aq) 

II. 2 AgNO3 (aq) + Cu (s) → Cu(NO3)2 (aq) + 2 Ag (s) 

III. CO2 (g) + 2 LiOH (aq) → 2 Li2CO3 (aq) + H2O (l)

IV. FeCl2 (aq) + 2 NaOH (aq) → Fe(OH)2 (aq) + 2 NaCl (aq)