92. Solving a chemistry problem

92. Solving a chemistry problem

40. Calculate the amount of soda required to soften 300 m3 with a non-carbonate hardness of 2.5 mmol/l, with an excess of the reagent equal to 0.5 mmol/l, and the content of sodium carbonate in the commercial product equal to 80%. Write the equations for water softening reactions.

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