Chapter 4.8, Problem 2RCF

The concentration of a KMnO₄ solution can be determined by redox titration with oxalate ion, ${\text{C}}_2{\text{O}}_4^{2-}$, according to the net ionic equation

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

What is the concentration of a KMnO₄ solution if 20.24 mL of 0.2558 M ${\text{C}}_2{\text{O}}_4^{2-}$ solution is needed to reduce 25.00 mL of KMnO₄ solution?