29. Решение задачки по химии №190

1. To a sample weighing 0.1 g of Na3PO4 was added 25.0 ml of a 0.4 mol-eq/l H2SO4 solution. For back titration of excess acid with methyl orange, 15.0 ml of NaOH solution was used. Determine the molar concentration of the equivalent (normality) of the NaOH solution.

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