A crystalline hydrated salt on heating gives a residue 44.1% of its mass. The formula of that salt is:
1
Na2SO4.7H2 O
2
Na2SO4.10H2O
3
Na2SO4.2H2O
4
Na2SO4.5H2O
A crystalline hydrated salt on heating gives a residue 44.1% of its mass. The formula of that salt is: