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(1) 100 g of hard water contains 0.00475 g MgCly. What is the hardness of water in ppm?50 ppm5 ppin500 ppm475 ppini |
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Answer» your ans is here plz mark me as brainlist Explanation: TOTAL hardness= CA hardness + Mg hardness The calcium and Mg hardness is the concentration of Ca & Mg IONS expressed as equivalents of CaCO 3
For Mg= M Mg
M CaCO 3
= 24.3 100.1
=4.1 So total hardness= 4.1[Mg 2+ ]ppm of CaCO 3
Given 100kg of water contains 5g MgSO 4
i.e, 100L water contains 500mg of MgSO 4
= M MgSO 4
(500mg)24.3
= 120.7 (500mg)(24.3)
=100mg of Mg ims ∴[Mg 2+ ]=100mg/100L=1mg/L So hardness of water= 4.1[1mg/L] =4.1ppm of CaCO 3
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