7. Redox Reactions

Balancing Redox Equations — Quiz

Test your understanding of balancing redox equations with 5 practice questions.

Practice Questions

Question 1

In the reaction: Cr₂O₇²⁻ + I⁻ → Cr³⁺ + I₂ (acidic solution), what is the correct coefficient of I⁻ when the equation is fully balanced?

Question 2

In the half-reaction: Mn²⁺ → MnO₄⁻ (basic solution), how many OH⁻ ions are needed to balance the oxygen atoms?

Question 3

In the redox reaction: NO₃⁻ + H₂O + e⁻ → NO₂ + OH⁻ (basic solution), what is the correct coefficient of H₂O when the equation is fully balanced?

Question 4

In the reaction: H₂O₂ + MnO₄⁻ → O₂ + Mn²⁺ (acidic solution), what is the correct coefficient of H₂O when the equation is fully balanced?

Question 5

When balancing the half-reaction: Cu → Cu²⁺ (basic solution), how many OH⁻ ions are needed to balance the hydrogen atoms after converting from acidic to basic conditions?