Question

How much copper can be obtained from 100 g copper sulphate $\left(CuS{O}_4\right)$?

Answer 1

Mass of copper in copper sulphate:
$\text{Given: weightof}CuS{O}_4=100g$
$\text{Molarmassof}CuS{O}_4=1\times 63.5+32\times 1+16\times 4=159.5gmo{l}^{-1}$
From the formula of $CuS{O}_4$, it is clear that 1 mol of $CuS{O}_4$ contains 1 mole of Cu. or 159.5 g of $CuS{O}_4$ contains 63.5 g of Cu
$\text{Mass of Cu in 1gof}CuS{O}_4=\frac{63.5}{159.5}\text{gofCu}$
$\therefore \text{Mass of Cu in 100gof}CuS{O}_4=\frac{63.5}{159.5}\times \text{100 gofCu}$
$\text{Hence, amount of Cu}=\frac{63.5\times 100}{159.5}=39.81g$
Final answer: Amount of Cu in 100 g $CuS{O}_4$ is 39.81 g