Question Detail
Question
A 10.0 ml sample of sulphuric acid from an automobile battery requires 35.08 mL of 2.12 molar sodium hydroxide solutions for complete neutralization. What is the molarity of the sulphuric acid?
Correct Answer
Option A is the correct answer.
Detailed Explanation
Balanced equation: H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O. Moles NaOH = (0.03508 L)(2.12 mol/L) = 0.07437 mol. Moles H₂SO₄ = 0.07437 / 2 = 0.037185 mol. Molarity H₂SO₄ = 0.037185 mol / 0.010 L = 3.7185 M ≈ 3.72 M.
Hint
Remember the 1:2 mole ratio between H₂SO₄ and NaOH.