Question

Which one of the following will increase the voltage of the cell? $ Sn(s)+2A{{g}^{+}}(aq)\xrightarrow{{}}S{{n}^{2+}}+(aq)+2Ag(s) $

• A. Increase in the size of silver rod
• B. Increasing the size of plate
• C. Increase in the concentration of $ A{{g}^{+}} $ ions
• D. Increase in the concentration of $ S{{n}^{2+}} $ ions

Answer 1

Answer: (C)

$ {{E}_{cell}}=E_{cell}^{o}-\frac{0.0591}{2}\log \frac{[S{{n}^{2+}}]}{{{[A{{g}^{+}}]}^{2}}} $
Increase in the $ [A{{g}^{+}}] $
will decrease the logarithmic factor and hence, increase the ${{\text{E}}_{\text{cell}}}\text{.} $