Question

A solution contains Fe²⁺, Fe³⁺ and I^- ions. This solution was treated with iodine at 35°C. E° for Fe³⁺/Fe²⁺ is + 0.77 V and E° for I₂/2I^- = 0.536 V. The favourable redox reaction is

(a) I₂ will be reduced to I^-

(b) there will be no redox reaction

(c) I^- will be oxidised to I₂

(d) Fe²⁺ will be oxidised to Fe³⁺

Answer 1

Correct option (c) I^- will be oxidised to I₂

Explanation :

Since the reduction potential of Fe³⁺/Fe²⁺ is greater than that of I₂/I^- , Fe³⁺  will be reduced and I will be oxidised.