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EAMCET Medical EAMCET Medical Solved Paper-2005

  • question_answer
    The standard reduction potentials of \[\text{Z}{{\text{n}}^{\text{2+}}}|Zn\]and and \[C{{u}^{2+}}|Cu\]are \[-0.76\,V\]and \[+\,0.34\text{ }V\] respectively. What is the cell? \[\left( \frac{RT}{F}=0.059 \right)\]\[Zn|Z{{n}^{2+}}0.005|\,\,|C{{u}^{2+}}(0.005M)Cu\]

    A)  1.1295                                 

    B)  1.0705

    C)  1.1                                        

    D)  1.041

    Correct Answer: B

    Solution :

                     From Nemst equation, \[{{E}_{cell}}=E_{cell}^{o}-\frac{0.059}{n}\log \frac{[Z{{n}^{2+}}]}{[C{{u}^{2+}}]}\] \[[(+0.34)-(0.76)]-\frac{0.059}{2}\log \frac{0.05}{0.005}\] \[=1.10-\frac{0.059}{2}\times 1\] \[=1.10-0.0295\] \[=1.0705\,\,V\]


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