Question Detail
Question
A 25.0 mL of an H₂SO₄ solution is titrated with 35.65 mL of a 0.1095 M standardized NaOH solution. What is the concentration of the acid solution?
Correct Answer
Option B is the correct answer.
Detailed Explanation
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O. Moles NaOH = 0.03565 L × 0.1095 M = 0.003904 mol. Moles H₂SO₄ = 0.003904/2 = 0.001952 mol. Molarity H₂SO₄ = 0.001952/0.0250 = 0.07808 M.
Hint
Use the 1:2 mole ratio between H₂SO₄ and NaOH.