80. Solving a chemistry problem

80. Solving a chemistry problem

62. 25.00 ml of sodium hydroxide solution with T (NaOH) = 0.009021 g / ml was added to the ammonium sulfate solution. After removal of ammonia, 6.30 ml of hydrochloric acid solution with T(HCl)=0.007860 g/ml was used for titration of excess sodium hydroxide. Calculate the mass of (NH4)2SO4 in the analyzed solution.

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