121. Solving a chemistry problem

32. A weighing of technical sodium hydroxide weighing 0.3251 g was dissolved in a volumetric flask with a capacity of 100.0 ml. For titration of 25.00 ml of a solution with phenolphthalein, 18.40 ml of 0 1000 M HCl was used, and for titration of the same aliquot with methyl orange, 18.80 ml3 of acid was used. Calculate the mass fraction (%) of NaOH in the sample.
Answer: 88.58%