9. Решение задачи по химии №000 908

69. A portion of 0.5000 g of calcium carbonate was dissolved in 25.00 ml of 0.5100 N hydrochloric acid solution. The excess acid was titrated with 6.50 ml of 0.4900 N NaOH solution. Calculate the percentage of calcium carbonate CaCO3 in the sample.

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