Answer to Question #200165 in General Chemistry for Master j

Question

The cell represented below was set up under standard conditions.

Pt|Fe²⁺(aq), Fe³⁺(aq)||Tl³⁺ (aq),Tl⁺ (aq)|Pt Cell e.m.f. = + 0.48 V

(i) Deduce the standard electrode potential for the following half-reaction.

Tl³⁺(aq) + 2e^– → Tl⁺ (aq)

(ii) Write an equation for the spontaneous cell reaction.

Answer 1

(i) E_Ti3+/Ti+=0.48+0.77=1.25 V

(ii) 2Fe³⁺ + Ti⁺ = 2Fe²⁺ + Ti³⁺