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MHT CET · Chemistry · Electrochemistry

If \(E^{\circ}\left(\mathrm{Zn}_{(\mathrm{aq})}^{+2} \mid \mathrm{Zn}_{(\mathrm{s})}\right)=-0 \cdot 76 \mathrm{~V}\).
Calculate potential for \(\mathrm{Zn}_{(\mathrm{s})} \rightarrow \mathrm{Zn}_{(0.01 \mathrm{M})}^{+2}+2 \overline{\mathrm{e}}\) at 298 K ?

  1. A \(+0.8192 \mathrm{~V}\)
  2. B \(-0.8192\)
  3. C \(+0.7008 \mathrm{~V}\)
  4. D \(-0.7008 \mathrm{~V}\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(+0.8192 \mathrm{~V}\)

Step-by-step Solution

Detailed explanation

\(E^{\circ}_{\mathrm{oxidation}} = -E^{\circ}_{\mathrm{reduction}} = -(-0.76 \mathrm{~V}) = +0.76 \mathrm{~V}\) \(E = E^{\circ} - \frac{0.0592}{n} \log[\mathrm{Zn}^{+2}] \)