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BCECE Engineering BCECE Engineering Solved Paper-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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