Different samples of water containing each 100 ppm of CaCl2, MgSO4, CaSO4 and MgCl2 among them which will have greater hardness

The degree of hardness of water is measured in terms of CaCO3.→ The number of parts by weight of CaCO3 (Or) its equivalent Ca,Mg salts present in 106 parts by weight of water is called degree of hardness of water.100gr of CaCo3 = 111gr of CaCl2100gr of CaCo3 = 95gr of MgCl2100gr of CaCo3 = 120gr of MgSO4100gr of CaCo3 = 136gr of CaSO4100ppm of each means, 111gr of CaCl2 → 100gr of CaCo3100gr of CaCl2  → ? Similary, for MgCl2For MgCl2 For CaSO4 For MgSO4 Degree of hardness caused by MgCl2 sample is high Numerator vaule is low i.e,. Molecular weight is low for NgCl2.