Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryElectrochemistry1 Mark
Question
How can the reduction potential of an electrode be increased?
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Answer
$\text{M}^{\text{n}+}+\text{ne}^-\xrightarrow{ \ \ \ \ \ \ \ }\text{M},$
$\frac{\text{E}_{\text{M}^{\text{n}+}}}{\text{M}}=\frac{\text{E}^{\circ}_{\text{M}^{\text{n}+}}}{\text{M}}-\frac{\text{RT}}{\text{nF}}\text{In}\frac{1}{[\text{M}^{\text{n}+}]}$
$=\frac{\text{E}^{\circ}_{\text{M}^{\text{n}+}}}{\text{M}}+\frac{\text{RT}}{\text{nF}}\text{In}[\text{M}^{\text{n}+}]$
Thus, electrode potential can be increased by increasing the metal ion concentration.
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