Question

Which equation describes a reduction?

Answer 1

Answer:

2Cl+2e -->2Cl^-

Explanation:

reduction is the gain of electrons and this is the only option which fits the definition.

Answer 2

Answer:

2 Cl + 2 e⁻ → 2 Cl⁻

Explanation:

Which equation describes a reduction?

• Mg(s) → Mg²⁺(aq) + 2 e⁻. NO. This is an oxidation because Mg loses electrons and its oxidation number increases from 0 to 2.

• 2 Cl + 2 e⁻ → 2 Cl⁻. YES. This is a reduction because Cl gains electrons and its oxidation number decreases from 0 to 1-.

• Na(s) → Na⁺(aq) + e⁻. NO. This is an oxidation because Na loses electrons and its oxidation number increases from 0 to 1.

• Al(s) → Al³⁺(aq) + 3 e⁻. NO. This is an oxidation because Al loses electrons and its oxidation number increases from 0 to 3.