Question

A solution of copper sulphate $\left(CuSO_{4}\right)$ is electrolysed for 10 minutes with a current of $1.5$ amperes. The mass of copper deposited at the cathode (at. mass of $Cu = 63u$) is :

• A. 0.3892 g
• B. 0.2938 g
• C. 0.2398 g
• D. 0.3928 g

Answer 1

Answer: (B)

0.2938 g

Answer 2

W= Zit where Z = Electrochemical equivalent E wt. of copper =$\frac{63}{2}=31.5$ $Z=\frac{31.5}{96500}$ $W=Zit=\frac{31.5}{96500} \times1.5\times10\times60=0.2938 g$