Question

What is electrolysis? A solution of $CuS{O}_4$ is electrolysed for $10$ minutes with a current of $1.5$ amperes. What is the mass of copper deposited at the cathode?

Answer 1

Electrolysis is a process in which an electric current is used to bring about a chemical reaction or a process in which an electrical energy is converted into a chemical energy.
Number of moles of electrons passed
$=\frac{I\left(A\right)\times t\left(s\right)}{96500}=\frac{1.5\times 10\times 60}{96500}=0.009326$ moles of electrons
$C{u}^{2+}+2e^{-}\to Cu$
The number of moles of copper deposited $=\frac{0.009326}{2}=0.004663$ moles.
The molar mass of Cu is 63.5 g/mol.
The mass of Cu deposited $=0.004663mol\times 63.5g/mol=0.296g$