141. Задачка по химии №014 161

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

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