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Electrochemistry — Chemistry STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryElectrochemistry2 Marks
Question
Using the standard electrode potentials given in Table $3.1,$ predict if the reaction between the following is feasible$: Ag^+ (aq)$ and $Cu(s)$
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Answer

$\text{Ag}^{+}_\text{(aq)}+\text{e}^-\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ \ } \text{Ag}_\text{(s)}\Big]\times2\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ ;\ \ \ \ \ \ \ \ \ \ \ \text{E}^\circ=+0.80\ \text{V}$
$\text{Cu}_\text{(s)}\ \ \ \ \ \ \xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ \ } \text{Cu}^{2+}_\text{(aq)}+2\text{e}^-\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ ;\ \ \ \ \ \ \ \ \ \ \ \text{E}^\circ=-0.34\ \text{V}$
$\overline{2\text{Ag}^{+}_\text{(aq)}+\text{Cu}\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ \ }2\text{Ag}_\text{(s)}+\text{Cu}^{2+}\text{(aq)} \ \ \ \ \ \ ;\ \ \ \ \ \ \ \ \ \ \ \text{E}^\circ=+0.23\ \text{V}}$
Since $E^\circ$ for the overall reaction is positive, the reaction between $Ag^+ (aq)$ and $Cu(s)$ is feasible.

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