Which one of the following will increase the voltage of the cell ? `(T = 298 K)`
` Sn+ 2Ag^+ rarr Sn^(2+) +2 Ag`.

Options

A. increase in concentration of ` Sn^(2+)`
B. Increase in size of silver rod
C. Increase in the concentration of `Ag^+`
D. none of these

Answer

C

Explanation

` C_(cell) = F_(cell)^@ -(2.303RP)/(nF) log. ([Sn^(2+)])/([Ag^(2+)]^@) `. Increase in the concentration of `Ag^+` decreases the value of log `([Sn^(2+)])/([Ag^(2+)])`
This results in the increase value of ` E_("cell")`.