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Q.

    In the galvanic cell Zn/Zn2+(C1)//Cu2+(C2)/Cu Ecell – E0Cell = + 0.0591V. The value of C2/C1  at 298K is

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a

10–1

b

 102

c

10–2    

d

10

answer is B.

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Detailed Solution

\large {E_{cell}} = E_{cell}^o - \frac{{0.0591}}{2}\log \frac{{\left[ {Z{n^{ + 2}}} \right]}}{{\left[ {C{u^{ + 2}}} \right]}}

\large {E_{cell}} - E_{cell}^o = \frac{{0.0591}}{2}\log \frac{{\left[ {C{u^{ + 2}}} \right]}}{{\left[ {Z{n^{ + 2}}} \right]}}

\large \log \frac{{\left[ {{C_2}} \right]}}{{\left[ {{C_1}} \right]}} = \frac{{2 \times 0.0591}}{{0.0591}} = 2

\large \frac{{\left[ {{C_2}} \right]}}{{\left[ {{C_1}} \right]}} = {10^2}

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