Answers: 3
![[\Delta V=(V_{pb}^{0}-V_{sn}^{0})-\frac{0.592}{n}log\frac{[Sn^{2+}]}{[Pb^{2+}]}](/tpl/images/0410/3129/9e221.png)
![[Sn^{2+}]= 0.25M](/tpl/images/0410/3129/b50c0.png)
![[Pb^{2+}]=5\times 10^{-2}M](/tpl/images/0410/3129/01669.png)
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