21. Solving a chemistry problem
8. When determining carbonate hardness, 10.25 cm3 of a 0.1 M hydrochloric acid solution was used to titrate 200 cm3 of water. When determining the total hardness per 100 cm3 of the same water, 15.12 cm3 of 0.100 N were used. EDTA solution. Calculate the carbonate, permanent and total hardness of water (mmol/dm3).
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