50g of steel wire was dissolved in excessive of diluted sulphuric acid and the solution was made up to 250ml in a standard flask. 25ml of this solution was pipetted into a conical flask and needed 25.45ml of 0.02M KMnO4 for complete oxidation.
calculate the percentage of iron in the sample.

Question

50g of steel wire was dissolved in excessive of diluted sulphuric acid and the solution was made up to 250ml in a standard flask. 25ml of this solution was pipetted into a conical flask and needed 25.45ml of 0.02M KMnO4 for complete oxidation.
calculate the percentage of iron in the sample.

anonymous · Answer

What is the molarity of the acid sol'n?

jfraser · Answer

We don't need to know the concentration of the orignal acid, since the volume and concentration used in the oxidation tells us moles of iron anyway.