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AMU Medical AMU Solved Paper-1999

  • question_answer
    A zinc rod is placed in 0.095 M solution of zinc sulphate at 298 K, the potential of the electrode at this temperature is[\[E_{Zn}^{o}=-0.76\]volts]

    A)  \[-0.79\]volts       

    B)  \[-0.69\]volts

    C)  \[-0.59\]volts       

    D)  \[-0.49\]volts

    Correct Answer: A

    Solution :

    : \[{{E}_{cell}}=E_{cell}^{o}+\frac{0.0591}{n}\log [Z{{n}^{++}}]\] \[{{E}_{cell}}=-0.76+\frac{0.0591}{n}\log (0.095)\] \[=-0.76-0.030=0.79\]volts.


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