Question

A 14.8 g sample of an aqueous solution of nitric acid contains an unknown amount of the acid.
If 11.5 mL of 1.12 M barium hydroxide are required to neutralize the nitric acid, what is the percent by mass of nitric acid in the mixture?

% by mass

Answer 1

or The Pequation of reaction is a HNO3 +NaOH. - NaN 03 + H2O y Calculate moles of NaOH - Malos of Maced = 11:5 mLx_fil2 mmol 1 ml NaOH I-INO 3 = 12.88 mmol NaOH 2x Calculate moles of HNO3 → Mells of HNO3.-12.88 mmol NaOH x imme - 1 mmol Nooth ... = 12.88 mmol HNO3 37 Mass of HNO3 - 3 Mass= 12.88 mmol thoz x 63.01 mg HNO3 - 1 mmol No3 811.5688x10-39 HNO3

4 calculate mass percent of HNO 3 Moss if 811.5608 x 100 *103 ..........4468 = 5:483%
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