A 25.00 mL sample of a phosphoric acid solution was titrated to completion with 37.04 mL of 0.1107 M sodium hydroxide.What was the concentration of the phosphoric acid?

Question

Quizplus · Accepted Answer

The correct answer is A because the concentration of the phosphoric acid can be calculated using the formula:M1V1 = M2V2where M1 is the concentration of the sodium hydroxide solution, V1 is the volume of the sodium hydroxide solution used, M2 is the concentration of the phosphoric acid solution, and V2 is the volume of the phosphoric acid solution.Plugging in the values given in the question, we get:0.1107 M * 37.04 mL = M2 * 25.00 mLSolving for M2, we get:M2 = 0.05467 M

A 2500 ML Sample of a Phosphoric Acid Solution Was Titrated