1. A permanganate solution is prepared by dissolving 20.0123 g KMnO₄ in 500 mL of distilled water and boiled for 1 hour to remove any organic material. After filtration, the solution is transferred to a 1.0 L volumetric flask and diluted to volume with distilled water. The permanganate solution was titrated against 0.2046 M oxalic acid prepared in sulfuric acid solution. A 50.00 mL aliquot of oxalic acid solution required 36.36 mL of permanganate solution. A titration blank required 0.08 mL of permanganate. What is the permanganate molarity? (The molecular mass of KMnO₄ is 158.04 g/mol.)

\[ 5 \text{ H}_2\text{C}_2\text{O}_4 + 2 \text{ MnO}_4^- + 6 \text{ H}^+ \rightleftharpoons 10 \text{ CO}_2 + 2 \text{ Mn}^{2+} + 8 \text{ H}_2\text{O} \]