Chapter 18, Problem 18.68QP

The oxidation of 25.0 mL of a solution containing Fe²⁺ requires 26.0 mL of 0.0250 M K₂Cr₂O₇ in acidic solution. Balance the following equation and calculate the molar concentration of Fe²⁺:

${\text{Cr}}_2{\text{O}}_7^{2-}+{\text{Fe}}^{2+}+{\text{H}}^{+}\stackrel{}{\to }{\text{Cr}}^{3+}+{\text{Fe}}^{3+}$