Chapter 4, Problem 4.99QP

Oxalic acid (H₂C₂O₄) is present in many plants and vegetables. If 24.0 mL of 0.0100 M KMnO₄ solution is needed to titrate 1.00 g of a sample of H₂C₂O₄ to the equivalence point, what is the percent by mass of H₂C₂O₄ in the sample? The net ionic equation is

$2{\text{MnO}}_4^{-}+16{\text{H}}^{+}+5{\text{C}}_2{\text{O}}_4^{2-}\to 2{\text{Mn}}^{2+}+10{\text{CO}}_2+8{\text{H}}_2\text{O}$