Question

In a titration experiment, 11.7 mL of an aqueous H2SO4 solution was titrated with 0.4 M NaOH solution. The equivalence point in the titration was reached when 10.7 mL of the NaOH solution was added. What is the molarity of the H2SO4 solution? H2SO4 molarity

Answer 1

3 Equati on: 2NaOH(aq)HSO (a)>NaSO (s)2H20() Concentrati on of NaOH 0.4 M Volume of NaOH run down from burette 10.7 mL 0.4 mmol No of millim oles of NaOH 10.7 mL x- 4.28 mmol 1 mL 1 mmol HSO No of millim oles of H2SO reacted 4.28 mm ol NaOH x- 2 mm ol NaOH = 2.14 mm ol H,SO Volume of HSO=11.7 mL 2.14mmol HSO Concentrati on of H2SO4 11.7 mL = 0.183 mol/L = 0.18 M 0.2 M