Suppose 0.09886 M KOH is titrated into 15.00 mL H2SO4 of unknown concentration until the equivalence point is reached. It takes a total volume of 29.25 mL KOH to neutralize the H2SO4.What is the stoichiometric ratio of base to acid?

Sulfuric acid is diprotic: each H₂SO₄ molecule can donate 2 H⁺ ions, so it reacts with 2 KOH molecules. The balanced reaction is H₂SO₄ + 2 KOH → K₂SO₄ + 2 H₂O. Thus, the stoichiometric ratio is 2 mol base to 1 mol acid, choice C.

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