0721. Solving a chemistry problem
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0721. Solving a chemistry problem
77. A sample of 0.1285 g of Na2CO3 was dissolved in water, 25 ml of 0.2034 M HCl solution was added, the excess acid was titrated with 23.42 ml of 0.1256 M NaOH solution. Calculate the mass fraction of impurities in soda.
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