Question

A 3.00 g sample containing Fe3O4, Fe2O, and an inert
impure substance is treated with excess of Kl solution in
presence of dilute H2SO4. The entire iron is converted into
Fe2+ along with the liberation of iodine. The resulting
solution is diluted to 100 mL. A 20 mL aliquot of the diluted
solution requires 11.0 mL 0.5 M Na S202 solution to reduce
the iodine present. A 50 mL of the diluted solution after
complete extraction of the iodine requires 12.80 mL of 0.25
M KMnO4 solution in dilute H2SO4 medium for the
oxidation of Fe2+. Calculate the percentage of Fe2O3 in the
original sample.​

Answer 1

Explanation:

A 3.00 g sample containing Fe3O4 Fe2O3, and an inert impure substance, is treated with excess of KI solution in presence of dilute H2SO4. The entire iron is converted into Fe2+ along with the liberation of iodine. The resulting solution is diluted to 100 mL. Please Mark as brainlist please please please please please please please please please please