(Answered) A a sample of dolomitic limestone with a mass of 08020 g is

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a. A sample of dolomitic limestone, with a mass of 0.8020 g, is reacted with hydrochloric acid. The mass of carbon dioxide released is 0.3725 g. Assuming the sample has a 1:1 mole ratio of MgCO3 to CaCO3, determine the mass of each in the sample.

b. A 25.00 mL sample of water buffered at a pH of 10 is titrated with 0.009885 M EDTA using the Calmagite indicator. A volume of 6.82 mL of EDTA is required. Determine the hardness of the water sample.

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