The formula for a hydrate : NiSO₄. 7H₂O
Further explanation
Given
55.2% NiSO₄, and 44.8% H₂O
Required
The formula
Solution
MW NiSO₄ = 154,75 g/mol
MW H₂O = 18 g/mol
Mol ratio :
NiSO₄ : 55.2 : 154,75 g/mol = 0.357
H₂O : 44.8 : 18 g/mol = 2.49
Divide by 0.357 :
NiSO₄ = 0.357/0.357 = 1
H₂O = 2.49/0.357 = 7
