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A sample of water contains 0.012 g of MgSO_(4) per litre. The hardness of the water sample in ppm is |
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Answer» 20 PPM `rArr"60 g of "MgSO_(4)-="50 g of "CaCO_(3)` `therefore"0.012 g of "MhSO_(4)-=(50xx0.012)/(60)="0.01 g of "CaCP_(3)` `rArr"1 LITRE of water contains 0.01 parts by weight of "CaCO_(3)` `"i.e. 1000 parts of water contains 0.01 parts by weight of "CaCO_(3)` `rArr ""10^(6)` parts by weight of water contains 10 parts by weight of `CaCO_(3)`. `therefore` The hardness of the water sample is 10 ppm. |
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