116. Solving a chemistry problem
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116. Solving a chemistry problem
39. Determine the amount of sodium phosphate needed to soften 200 m3 of water containing Ca2+ - 50.1 mmol / l, Mg2 + - 30.4 mg / l (excess reagent 0.5 mmol / l, Na3P04 content in the commercial product - 70% ). Write the equations of softening reactions.
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