A 250 ML Sample of 0

Multiple Choice

A 25.0 mL sample of 0.723 M HClO₄ is titrated with a 0.27 M KOH solution. The H₃O⁺ concentration after the addition of 80.0 mL of KOH is M.

A) 1.0 × 10^{- 7}
B) 0.44
C) 2.8 × 10^{- 13}
D) 0.72
E) 3.6 × 10^{- 2}