Question

In the cell reaction
P+(𝑎𝑞)+Q(𝑠)→P(𝑠)+Q+(𝑎𝑞)
the EMF of the cell, 𝐸𝑐𝑒𝑙𝑙 is zero. The standard EMF of the cell, 𝐸𝑜𝑐𝑒𝑙𝑙 is
[Given:
Activities of all solids are unity.
Activity of P+(𝑎𝑞) is 2 M. Activity of Q+(𝑎𝑞) is 1 M.
𝑅 = universal gas constant; 𝑇 = temperature; 𝐹 = Faraday constant]

• A. $\frac{RT}{F}$
• B. $\frac{RT}{2F}$
• C. $-\frac{RT}{F}In(2)$
• D. $\frac{RT}{F}In(2)$

Answer 1

Answer: (C)

$-\frac{RT}{F}In(2)$

Answer 2

The correct option is (C): $-\frac{RT}{F}In(2)$