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Q)

Given the $rx_n, \;2Fe^{3+}(aq)+Sn^{2+}(aq)\rightarrow 2Fe^{2+}(aq)+Sn^{4+}(aq)$ what is the equ.constant of given $rx_n$

Given:

$Fe^{3+}(aq)+2e^-\rightarrow Fe^{2+}(aq)\;E^{\large\circ}=0.77V$

$Sn^{4+}+2e^-\rightarrow Sn^{2+}(aq)\;E^{\large\circ}=0.75V$

$\begin{array}{1 1}(A)\;9\times 10^{20}V&(B)\;9.55\times 10^{20}V\\(C)\;8.23\times 10^{10}V&(D)\;9.55\times 10^{15}V\end{array}$

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