Multiple choice

In the cell Zn l Zn+ (0.1 M) ll Ag+ (10 M) l Ag, calculate e.m.f of the cell at 25o C, if Eo cell = 1.36 at 25o C.

    • 1.4485 volts
    • 1.4485 volts
    • 1.2715 volts
    • 1.2715 volts
  1. None of above

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A Correct answer
Explanation

E cell = Eo cell – 0.059/2 log Product/Reactant
The cell reaction is Zn (s) + 2Ag+(aq) → Zn2+ (aq) + 2Ag(s). E cell = 1.36 - 0.059/2 log [ 0.1/102] = 1.36 – (- 0.0885) = + 1.4485 volts.