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Calculate the hardness of a water sample...

Calculate the hardness of a water sample which contains 0.001 mole of `MgSO_(4)` dissolved perr litre of the solution.

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0.001 mole of `MgSO_(4)-=0.001 ` mole `CaCO_(3)=0.001xx1000 ` mg =100 mg
1L of `H_(2)O-=10^(3) g = 10^(6) ` mg `therefore ` Degree of hardness =100 ppm
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