What is the concentration?

Question

Suppose you are titrating a sulfuric acid solution of unknown concentration with a sodium hydroxide solution according to the equation:

H2SO4+2NaOH⟶2H2O+Na2SO4

*If you require 25.46 mL of 0.959 M NaOH solution to titrate 201.7 mL of H2SO4 solution, what is the concentration of the H2SO4 solution?

Answer 1

25.46 mL NaOH x 1L NaOH x 0.959 moles NaOH x 1 mole H₂SO₄ = 0.0122 moles H₂SO₄

1000 mL NaOH 1 L NaOH 2 moles NaOH

Molarity = moles

L

201.7 mL H₂SO₄ 1L H₂SO₄ = 0.2017 L H₂SO₄

1000 mL H₂SO₄

Molarity = 0.0122 moles H₂SO₄

0.2017 L H₂SO₄

= 0.0605 M H₂SO₄