Question 13 (4 points)

Question

Classify each half reaction below as oxidation or reduction.

When electrons are lost, they are written as a product in a half reaction.

When electrons are gained, they are written as a reactant in a half reaction.

When electrons are lost, the oxidation number increases.

When electrons are gained, the oxidation number decreases.

Column A
1. Sn^2+-----> Sn^4+ +2e^-
2. Ce^4+ + e ^- ---> Ce^3+
3. 2Fe^3+ + 2e^- ----> 2Fe^2+
4. Fe^2+ ----> Fe^3+ + e^-

Column B
a.Reduction
b.Oxidation

Answer 1

Column A
1. Oxidation
2. Reduction
3. Reduction
4. Oxidation

Column B
1. b
2. a
3. a
4. b