TITRATION 1. The molarity of an aqueous solution of hydrochloric acid , HCl , is

Question

TITRATION

1. The molarity of an aqueous solution of hydrochloric acid, HCl, is determined by titration with a 0.161 M sodium hydroxide, NaOH, solution. If 27.2 mL of sodium hydroxide are required to neutralize 18.2 mL of the acid, what is the molarity of the hydrochloric acid solution?

2. The molarity of an aqueous solution of sodium hydroxide, NaOH, is determined by titration against a 0.187 M hydrochloric acid, HCl, solution. If 39.2 mL of the base are required to neutralize 16.2 mL of hydrochloric acid, what is the molarity of the sodium hydroxide solution?

Explanation / Answer

Answer 1: M1V1 = M2V2

M1 x 18.2mL = 0.161M x 27.2 mL

M1 = molarity of HCl = 0.24M

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