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Electrode Potential

When a cathod...

Question

When a cathode half cell electrode $A g^{+} / A g$ is connected with a reference electrode (Standard hydrogen electrode), the mearsured standard EMF of the cell is $0.80 V$ . What will be the standard electrode potential of $A g^{+} / A g$ ?

0.8 V

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- 0.8 V

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- 1.2 V

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1. 2 V

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Solution

The correct option is A $0.8 V$
$E_{c e l l}^{\circ} = E_{A g^{+} / A g}^{\circ} - E_{S H E}^{\circ}$

The reference electrode is arbitrarily assumed to be zero.
$∴$
$E_{S H E}^{\circ} = 0$
Given,
$E_{c e l l}^{\circ} = 0.80 V$

Thus,
$0.80 = E_{A g^{+} / A g}^{\circ} - 0$

$E_{A g^{+} / A g}^{\circ} = 0.80 V$

The standard electrode potential of $A g^{+} / A g$ electrode is $0.80 V$

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