JEE Main Chemistry question
The standard electrode potential for the change Sn(s)+2\mathrm{Fe^{3+}}(aq)\rightarrow2\mathrm{Fe^{2+}}(aq)+\mathrm{Sn^{2+}}(aq) is (given V and V)
Answer: (C)
Solution
E^\circ_{cell}=E^\circ_{cathode}-E^\circ_{anode}=E^\circ(\mathrm{Fe^{3+}/Fe^{2+}})-E^\circ(\mathrm{Sn^{2+}/Sn})=0.77-(-0.14)=0.91 V.