(a) Calculate E°cell for the following reaction at 298K: 2Al_((s)) + 3Cu^(+2)(0.01M) → 2Al^(+3)(0.01M) + 3Cu(s)

### Question Asked by a Student from EXXAMM.com Team

Q 2660280115.     (a) Calculate E°cell for the following reaction at 298K:

2Al_((s)) + 3Cu^(+2)(0.01M) → 2Al^(+3)(0.01M) + 3Cu(s)
Given: E_(cell) = 1.98V

(b) Using the E° values of A and B, predict which is better for coating the surface of iron [E°(Fe^(+2)//Fe) = -0.44V] to prevent corrosion and why?
Given: E° (A^(+2)//A)=-2.37 V: E°(B^(+2)//B)= -0.14V

text( OR )

(a) The conductivity of 0.001 mol L^-1 solution of CH_3COOH is 3.905 × 10^-5 S cm^-1. Calculate its molar conductivity and degree of dissociation (α)
Given λ°(H^+ )= 349.6 S cm^2 mo^l-1 and λ°(CH_3COO^- )= 40.9 S cm^2mol^-1.

(b) Define electrochemical cell. What happens if external potential applied becomes greater than E°_(cell) of electrochemical cell?

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