Calculate the EMF between copper and silver Ag+e-E=0.89v
Cu=E=0.34v

Depending on the value of , the cell potential would be:

Explanation:

In this galvanic cell, the following two reactions are going on:

Note that the standard reduction potential of ions to is higher than that of ions to . Alternatively, consider the fact that in the metal activity series, copper is more reactive than silver. Either way, the reaction is this cell will be spontaneous (and will generate a positive EMF) only if ions are reduced while is oxidized.

Therefore:

The cell potential is the sum of the electrode potentials at the cathode and at the anode:

.

Using data from the 1985 and 2012 CRC Handbook:

.

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