2. Determine the mass of milk of lime for softening water of a given composition: total hardness - 10.5 mmol * eq / l; constant hardness - 6.1 mmol*eq/l; volume flow of water 50 m3/h. The mass fraction of Ca(OH)2 in lime milk is 6%, the mass concentration of CO2 is 15.2 mg/l.

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