Concept #1: **OXIDATION-REDUCTION (REDOX)** reactions deal with the transfer of electrons from one reactant to another.

Concept #2: The movement of electrons from one electrode to another helps in the generation of voltage.

Example #1:

Example #2: Basic Redoxs Calculations 1

Practice: Solve for the missing variable in the following circuit.

Practice: Solve for the missing variable in the following circuit.

Example #3: Basic Redoxs Calculations 2

Example #4: Basic Redoxs Calculations 2

Practice: A metal forms the salt MCl _{3}. Electrolysis of the molten salt with a current of 0.700 A for 6.63 h produced 3.00 g of the metal. What is the molar mass of the metal?

Example #5: Basic Redoxs Calculations 3

Example #6: Basic Redoxs Calculations 3

Example #7: Basic Redoxs Calculations 3

Concept #3: Generally, you will need to balance a redox reaction in an acidic or basic solution.

Example #8: Balance the following redox reaction in acidic solution.

Cr_{2}O_{7}** ^{2–}** (

Practice: Balance the following redox reaction in basic solution.

Cr_{2}O_{7}** ^{2–}** (aq) + SO