Calculate standard cell potential for a cell having following reaction, $\begin{aligned} & 2…

Calculate standard cell potential for a cell having following reaction, $\begin{aligned} & 2 \mathrm{Al}_{(\mathrm{s})}+3 \mathrm{Ni}^{2+} \rightarrow 2 \mathrm{Al}^{3+}+3 \mathrm{Ni}(\mathrm{s}) \\ & \left(\mathrm{E}_{\mathrm{Ni}}^{\circ}=-0.25 \mathrm{~V}, \mathrm{E}_{\mathrm{A} 1}^{\circ}=-1.66 \mathrm{~V}\right)\end{aligned}$
  1. $0.50 \mathrm{~V}$
  2. $1.41 \mathrm{~V}$
  3. $-0.50 \mathrm{~V}$
  4. $0.41 \mathrm{~V}$

Solution

$\begin{aligned} & \mathrm{E}_{\text {cell }}^{\circ}=\mathrm{E}_{\mathrm{Ni}}^{\circ}-\mathrm{E}_{\mathrm{Ai}}^{\circ} \\ & =-0.25-(-1.66) \\ & =1.41 \mathrm{~V}\end{aligned}$

Asked in: MHT CET 2022 (05 Aug Shift 2)

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