40. The electric current is produced in an electrochemical cell having the following cell reaction Fe + Cu+2. Reversible Fe+2. + Cu If 0.85 faraday electricity is obtained from this standard cell what maximum work can be done? The value of the standard cell potential is 0.78volt.??

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Q. Which of the following value of

C_{1}

is possible for given cell at constant temperature, if cell potential increase on increasing same value of concentration in both the solution of cell?

F e | {F e}_{C_{1}}^{2 +} ∥ {C u}_{0.4 M}^{2 +} | C u

Q. Which Nernst equation is true to find out the potential of non-standard electrochemical cell from the following?

F e (s) | F e^{2 +} (x M) | | I^{-} (a q .) | I_{2} (s) (P t)

Q. When metallic copper is shaken with a solution of a copper salt, the reaction

C u + {C u}^{2 +} \to 2 {C u}^{+}

proceeds. When equilibrium is established at

298 K

[{C u}^{2 +}] / {[{C u}^{+}]}^{2} = 1.66 \times 10^{6}

{(m o l {d m}^{- 3})}^{- 1}

. If the standard potential of the

{C u}^{2 +} | C u

half-cell is

+ 0.337 V

, what is the standard (reduction) potential of

{C u}^{+} | C u

half cell.

Q. The standard e.m.f. of the following cell is

0.463 V

C u | C u_{(1 M)}^{+ +} | | A g_{(1 M)}^{+} | A g

. If

E_{A g}^{o} = 0.800 V

, what is the standard potential of Cu electrode?

The standard reduction potentials of Cu $^{2 +}$ /Cu and Cu $^{2 +}$ /Cu $^{+}$ are 0.337 and 0.153V respectively. The standard electrode potential of Cu $^{+}$ /Cu half cell will be:

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