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`

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(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?