Zinc reacts with iron iii chloride

Asked by maham237 @ 10/01/2021 in Chemistry viewed by 307 People

What is the balanced equation for: Zinc reacts with Iron (III) Chloride yielding Zinc Chloride plus Iron Precipitate?

Answered by maham237 @ 10/01/2021

Answer:

3Zn(s) + 2FeCl₃(aq) → 2Fe(s) + 3ZnCl₂ (aq)

Explanation:

This is a redox reaction where solid iron is formed by the reaction of Zn and Iron(III) chloride. We called redox because the iron is reduced and the zinc is oxidized.

The reactants are: Zn(s) and FeCl₃(aq)

The products are: ZnCl₂(aq) and Fe(s)

Zn(s) → Zn²⁺(aq) + 2e⁻ Oxidation

Fe³⁺(aq) + 3e⁻ → Fe(s) Reduction

The e- are unballanced so we multiply the half reactions:

(Zn(s) → Zn²⁺(aq) + 2e⁻) . 3 → 3Zn(s) → 3Zn²⁺(aq) + 6e⁻

(Fe³⁺(aq) + 3e⁻ → Fe(s)) . 2 → 2Fe³⁺(aq) + 6e⁻ → 2Fe(s)

When we sum the half reactions, the electrons can be cancelled:

3Zn(s) + 2Fe³⁺(aq) + 6e⁻ → 2Fe(s) + 3Zn²⁺(aq) + 6e⁻

Balanced equation: 3Zn(s) + 2FeCl₃(aq) → 2Fe(s) + 3ZnCl₂ (aq)

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