Question

The density of copper is 8.94 $\text{g/ml}$. Find the charge needed to plate an area of $10\times 10{\text{cm}}^2$ to a thickness of ${10}^{-2}\text{cm}$ using a $CuS{O}_4$ solution as an electrolyte. (Molar mass of Cu = 63.54 $\text{g/mol})$

• A. $2.7\times {10}^{4}C$
• B. $2.7\times {10}^{6}C$
• C. $2.717C$
• D. $2.7\times {10}^{3}C$

Answer 1

The correct option is A $2.7\times {10}^{4}C$

$W=\frac{QM}{nF}W=d\times \text{area}\times \text{thickness}M=63.5\text{g/mol},n=2Q=\frac{d\times \text{area}\times \text{thickness}}{M}\times nFQ=\frac{8.94\times 10\times 10\times {10}^{-2}\times 2\times 96500}{63.5}Q=2.7\times {10}^{4}C$