Answer :
Answer:
Fe → Fe³⁺ + 3e⁻ Half reaction of oxidation
Cl₂ + 2e⁻ → 2Cl⁻ Half reaction of reduction
Explanation:
The main reaction is:
2Fe + 3Cl₂ → 2FeCl₃
Oxidation: The element increases the oxidation state
Fe changes from 0 to +3. It has released e⁻
Fe → Fe³⁺ + 3e⁻ Half reaction of oxidation
Reduction. The element decreases the oxidation state
Cl changes from 0 to -1. It has gained e⁻
Cl₂ + 2e⁻ → 2Cl⁻ (As chlorine is a dyatomic molecule we need a 2, to balance the chloride; at least the Cl gained to electrons) → Half reaction of reduction
One reaction releases 3 e⁻ and the other gains 2e⁻; therefore we have to multiply both reaction by 2 and 3, to balance the electrons to 6e⁻
(Fe → Fe³⁺ + 3e⁻ ) . 2
(Cl₂ + 2e⁻ → 2Cl⁻ ) . 3 and we sum both
2Fe + 3Cl₂ + 6e⁻ → 2Fe³⁺ + 6e⁻ + 6Cl⁻
So we cancel the electrons and we reach the balance reaction:
2Fe + 3Cl₂ → 2FeCl₃