ElectrochemistryHard

Question

The EMFs of the cell obtained by combining separately Zn and Cu electrodes of a Daniel cell with normal calomel electrodes are 1.083 V and − 0.018 V, respectively, at 250 C. If the potential of normal calomel electrode is − 0.28 V, the EMF of the Daniel cell is

Options

A.1.065 V
B.1.101 V
C.0.803 V
D.0.262 V

Solution

Ecell = ECu – EZn = (ECu – Ecalomel) – (EZn – Ecalomel)

From question Ecalomel – EZn = 1.083 V and Ecalomel – ECu = – 0.018 V

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