Check your learning. A 20.00-mL sample of aqueous oxalic acid, H₂C₂O₄, was titrated with a 0.09113-M solution of potassium permanganate, KMnO₄. 2MnO₄⁻(aq) + 5H₂C₂O₄(aq) + 6H⁺(aq) → 10CO₂(g) + 2Mn²⁺(aq) + 8H₂O(l). A volume of 23.24 mL was required to reach the endpoint. What is the oxalic acid concentration?
Options:
A. 0.0723 M
B. 0.09113 M
C. 0.125 M
D. 0.196 M
