A 3.00 g sample of powdered haematite contains iron(III) oxide, 
, as the
only iron compound. It was dissolved in dilute sulfuric acid forming a solution of
iron(III) sulfate.
THE
(aq) was reduced to 
(aq) using a solution of sulfur dioxide 
The resulting solution was made up to 250.0 cm 
The resulting solution was made up to 250.0 cm
25.00 cm
portions of this solution were titrated with
0.0250 mol dm
potassium manganate(VII) solution.
The mean titre was 24.50 cm
Explain why the solution of sulfur dioxide is suitable for reducing the iron(III) ionsUse the electrode potentials on page 15 of the Data Booklet.
