69 Решение задачки по химии №06 916

1. To determine Co2, a pharmaceutical preparation (m = 500 g) after appropriate treatment was diluted to 100 ml with a background electrolyte. For the current-voltage study, 10 ml of the solution was taken, diluted with the same background electrolyte to 20 ml, and a wave height of 35 mm was obtained. To build a calibration scale, a 0.001 M Co2 salt solution was prepared, precisely measured volumes of which were diluted to 20 ml with the same supporting electrolyte and the following values were obtained:
v, ml 1.0 2.0 3.0 4.0 5.0
h, mm 10 20 30 40 50
Calculate the mass fraction of CO2 in the analyzed pharmaceutical preparation.

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