Question

Mass of H2O in 100kg CuSO4.5H2O is (Cu : 63.5 )

Answer 1

CuSO₄.5H₂O is commonly called blue vitriol

Molecular mass of CuSO₄.5H₂O = 160 g + 90 g = 250 g

Mass of water in 250 g of blue vitriol is 90 g

Mass of water in 100 kg blue of vitriol
= 100 × 10³ g × 90 g / (250 g)
= 36 × 10³ g
= 36 kg

So, there is 36 kg of water in 100 kg of blue vitriol.