11. Solving a chemistry problem
27. A weighing of 0.1182 g of phosphoric acid was dissolved in water and 22.18 ml of 0.1 M NaOH (K = 0.9519) was used for its titration with respect to phenolphthalein. Determine the mass fraction (%) of H3PO4 in the sample, convert the result to the content of P2O5.
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