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Factors Affecting Electrolysis

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Question

Select the ion in each case, that would get selectively discharged from the aqueous mixture of the ions listed below:
$P b^{2 +}, A g^{+}$ and $C u^{2 +}$ .

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Solution

$A g^{+}$ ion would get selectively discharged from the aqueous mixture as it has highest value of standard reduction potential.
The standard reduction potentials of the ions are $P b^{2 +}$ : -0.126, $A g^{+}$ : 0.799 V and $C u^{2 +}$ : 0.337 V.

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