Calculate the concentration of the iron (II) ions in the sample.?

Question

The analysis of iron by an oxidation-reduction titration is a common analytical method. A common titrant used in this analysis is a solution of the cerium (IV) ion, which is reduced to cerium (III) in the analysis. In one chemical analysis of some iron ore, the sample is treated to convert all of the iron to iron(II) ions. A 25.0-mL sample of iron (II) is titrated with .125 mol/L cerium (IV) solution using a redox ondocator. The average volume of cerium (IV) required to reach the endpoint was 15.1 mL. Calculate the concentration of the iron (II) ions in the sample.

Answer 1

15.1 x 0.125/25