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4. When extracting phosphoric acid, a sample of the reaction mass with a volume of 10.00 ml was diluted to 500.0 ml. For titration of 25.00 ml of the resulting solution in the presence of methyl orange, 20.12 ml of NaOH solution [T(NaOH/H2SO4) = 0.004901] was used, and for titration of the same volume with phenolphthalein, 32.01 ml of NaOH was used. Calculate the concentration of H2SO4 and H3PO4 (g/l).
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