2. When determining carbonate hardness, 10.25 ml of a 0.1 M HCl solution was used for titration of 200 ml of water. When determining the total hardness per 100 ml of the same water, 15.12 ml of a 0.05 M EDTA solution were used. Calculate the carbonate, total and permanent hardness of water (mmol/l), assuming the molar mass of Me2 equivalent equal to M.

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