Question

Calculate the standard cell potentials of galvanic cell in which the following reactions take place: 

(i) 2Cr(s) + 3Cd²⁺(aq) → 2Cr³⁺(aq) + 3Cd 

(ii) Fe²⁺(aq) + Ag⁺(aq) → Fe³⁺(aq) + Ag(s) 

Calculate the ArG₉ and equilibrium constant of the reactions.

Answer 1

(i) For the given reaction, the Nernst equation can be given as:

∴ E^θ = 1.104V 

We know that, 

Δ_rG^θ = -nFE^θ 

= -2 × 96487× 1.04 

= - 213043.296J 

= -213.04KJ