What is the degree of hardness of a sample of water containing 24mg of MgSO_(4) (molecular mass 120) per kg of water?

What is the degree of hardness of a sample of water containing 24mg of

1.	What is the degree of hardness of a sample of water containing 24mg of MgSO_(4) (molecular mass 120) per kg of water?
Answer» 10ppm 15ppm 20ppm 25ppm Solution :24mg of `MgSO_(4)` present in 103 g of water 106 water will CONTAIN =24000mg of `MgSO_(4)=24` of `MgSO_(4)` So, 24g of `MgSO_(4)=(100)/(120)xx24=20g` of `CaCO_(3)` Hardness of water `=20ppm`