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JIPMER Jipmer Medical Solved Paper-2009

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

    A)  - 0.28 V                               

    B)  - 0.34 V               

    C)         - 0.82 V               

    D)         - 0.22 V

    Correct Answer: A

    Solution :

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


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