A sample was found to contain 15 gm of KNO3, 2 gmof silica, 5.1 gm of – InterviewSolution

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1.

A sample was found to contain 15 gm of KNO3, 2 gmof silica, 5.1 gm of sodium chloride and 3 gm ofCaCO3 per liter. Find the hardnessAns: 3000 ppm

Answer»

hardness in water is only due to the presence of. CaCO3 having mass = 3gm

and ppm is reported in mg/L

so, mass of CaCO3 in mg = 3000mg

so, hardness = 3000mg/1L = 3000ppm.

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