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Punjab Medical Punjab - MET Solved Paper-2008

  • question_answer
    What is the electrode potential (in\[V\]) of the following electrode at\[{{25}^{o}}C\]? \[N{{i}^{2+}}(0.1M/Ni(s)\](Standard reduction potential of\[N{{i}^{2+}}|Ni\]is\[-0.25V,\,\,\frac{2.303RT}{F}=0.06\]

    A) \[-0.28V\]                           

    B) \[-0.34V\]

    C) \[-0.82V\]                           

    D) \[-0.22V\]

    Correct Answer: A

    Solution :

    \[{{E}_{cell}}=E_{cell}^{o}-\frac{2.303RT}{nF}\log \left[ \frac{[Ni]}{[N{{i}^{2+}}]} \right]\]                 \[=-0.25-\frac{0.06}{2}\log \left( \frac{1}{0.1} \right)\]                 \[=-0.25-0.03\] \[{{E}_{cell}}=-0.28V\]


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