Calculate the hardness of water sample which contains 0.001 mole of MgSO_4 dissolved per litre of water.

Calculate the hardness of water sample which contains 0.001 mole of Mg

1.	Calculate the hardness of water sample which contains 0.001 mole of MgSO_4 dissolved per litre of water.
Answer» SOLUTION :`"1 mole "MgSO_4= "1 mole "CaCO_3` `10^(-3)" Mole "MgSO_4=10^(-3)" MOL "CaCO_3` `therefore "0.120g "MgSO_4 =0.1"g CaCO"_3" in 1000 mL "` `therefore "HARDNESS ==100ppm "`