Question

Zinc reacts with ${CuSO}_4$ according to the equation, $Zn+{CuSO}_4\to {ZnSO}_4+Cu$. If an excess of zinc is added to 100ml, 0.05M ${CuSO}_4$, the amount of copper formed in moles will be :

• A. $5$
• B. $0.5$
• C. $0.05$
• D. $0.005$

Answer 1

The correct option is D $0.005$

If an excess of zinc is added then the total amount of copper in copper solution gets converted into copper.

No of moles of $CuS{O}_4=0.1\times 0.05=0.005$ moles

1 mole $CuS{O}_4$ forms 1 mole $Cu$.

$\therefore$ 0.005 moles $CuS{O}_4$ forms 0.005 moles $Cu$.