Question

How much copper can be obtained from 100 g of copper sulphate (CuSO4) ?

Answer 1

Answer: We have

1 mole of CuSO₄ contains 1 mole of copper.

Molar mass of CuSO₄

= Atomic mass of [Cu × 1 + S × 1 + O × 4 ]

=(63.5) + (32.00) + 4(16.0) = 63.5 + 32.0 + 64.0

= 159.5 g

Here molar mass of Cu is 159.5 g so that 159.5 of CuSO₄ will produce 1 mole of Cu and mass of 1 mole of Cu is 63.5 g of copper.

So 100 g of CuSO₄ will produce = 63.5×100/159.5=39.8g

Hence, amount of copper obtained from 100 g CuSO4 = 39.8 g