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BCECE Medical BCECE Medical Solved Papers-2012

  • question_answer
    The equilibrium constant of the reaction; \[Cu(s)+2A{{g}^{+}}(aq)\xrightarrow{{}}C{{u}^{2+}}(aq)+2Ag(s)\]\[{{E}^{o}}=0.46\,V\]at 298 K

    A)  \[2.4\times {{10}^{10}}\]

    B)  \[2.0\times {{10}^{10}}\]

    C)  \[4.0\times {{10}^{10}}\]

    D)  \[4.0\times {{10}^{15}}\]

    Correct Answer: D

    Solution :

    \[Cu(s)+2A{{g}^{2+}}(aq)\xrightarrow{{}}C{{u}^{2+}}(aq)+2Ag(s);\]                 \[{{E}^{o}}=0.46\,V\]at 298 K                 \[\log \,{{K}_{C}}=\frac{nF{{E}^{o}}}{RT}=\frac{2\times 0.46}{0.059}\] \[{{K}_{C}}=4\times {{10}^{15}}\]


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