Redox Reactions Practice Problems

Corrosion is defined as the deterioration of refined metal, such as the rusting of iron. Identify the following reaction, one of the possible mechanisms for rusting, as oxidation or reduction:

Fe(s) → Fe²⁺(aq) + 2e⁻

Consider the following reaction:

Zn²⁺(aq) + 2e⁻ → Zn(s)

Determine whether the reaction above involves oxidation or reduction.

Which of the following statement is correct regarding a redox reaction?

On the reactant side in each of the given reactions below, determine the species that was oxidized and reduced and also provide the reducing agent and the oxidizing agent. 

(i) Sr(s) + I₂(s) → SrI₂(s)

(ii) Ag₂O(s) + Na(s) → 2 Ag(s) + Na₂O(s)

(i) Ga(s) + Cr³⁺(aq) → Ga³⁺(aq) + Cr(s)

Zinc metal reacts with hydrogen ions to form zinc ions and hydrogen gas. Provide the balanced equation, reducing agent, and oxidizing agent.

Consider the following reaction:

2 Cu₂O₃(s) + 3 C(s) → 4 Cu(s) + 3 CO ₂(g)

Identify the species that is reduced and the species that is oxidized

Identify the oxidizing agent in the following redox reaction. (You do not have to balance the equation).

S₂O₃²⁻_(aq) + I₃⁻_(aq) → S₄O₆²⁻_(aq) + I⁻_(aq)

From the reactions below, select the one that is a redox reaction.

Which of the following statements about this redox reaction is incorrect?

MnO₄⁻_(aq) + 5 Fe²⁺_(aq) + 8 H⁺_(aq) → Mn^2+(aq) + 5 Fe³⁺_(aq) + 4 H₂O_(l)