Question

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

• 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 ${\text{E}}_{\text{cell}}\text{.}$