Question

Which one of the following condition will increase the voltage of the cell represented by the equation :
$Cu(s)+2A{g}^{+}\text{(aq.) }\rightleftharpoons C{u}^{2+}\text{ (aq.) }+2Ag(s)$

• A. increase in the dimensions of $Cu$ electrode
• B. increase in the dimensions of $Ag$ electrode
• C. increase in the concentration of $C{u}^{2+}$ ions
• D. increase in the concentration of $A{g}^{+}$ ions

Answer 1

Answer: (D)

Since reduction occurs at Ag electrode hence, increase in the concentration of $A{g}^{+}$ or decrease in concentration of $C{u}^{2+}$ will increase the voltage.