Question

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

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

Answer 1

Answer: (D)

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