КО203 To 0.1500 g Na2CO3 was added 20.00 cm3 0.2150 M

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203. To 0.1500 g Na2CO3 was added 20.00 cm3 0.2150 M HCl solution, after which the excess acid was titrated NaOH solution was 7.60 cm3. Calculate the weight fraction of CO2 in the limestone, if C (HCl) / C (NaOH) = 0.983.

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