A compound contains only Fe and O A 0 2729 g sample of the compound was dissolved in 50 mL of concentrated acid solution, reducing all the iron to Fe 2 ions The resulting solution was diluted to 100 mL and then titrated with a 0 01621 M KMnO 4 solution The unbalanced chemical expression for reactio...

To determine the empirical formula of the compound we need to find the moles of Fe and O in the sa ...

A compound contains only Fe and O. A 0.2729 g sample of the compound was dissolved in

Question:

A compound contains only Fe and O. A 0.2729 g sample of the compound was dissolved in 50 mL of concentrated acid solution, reducing all the iron to Fe²⁺ ions. The resulting solution was diluted to 100 mL and then titrated with a 0.01621 M KMnO₄ solution. The unbalanced chemical expression for reaction between Fe²⁺ and MnO₄^- is given below.

MnO₄^-(aq) + Fe²⁺(aq) → Mn₂₊(aq) + Fe³⁺(aq) (not balanced)

The titration required 42.17 mL of the solution to reach the pink endpoint. What is the empirical formula of the compound?

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