1.5g of steel wire was dissolved in excessive of diluted sulphuric acid and the solution was made up to 250cm3 in a standard flask. 25cm3 of this solution was pipetted into a conical flask and needed 25.45cm3 of 0.02moldm-3 KMnO4 for complete oxidation. what is the iron percentage in the sample?

Question

preetha · Answer

Start with writing an equation for Fe with H2SO4.  Then write the equation of FeSo4 with KMnO4.
Then from the vol x Molarity of KMnO4, you can calculate the number of moles of KMnO4--> convert this to moles of FeSO4--> to moles of Fe and work through that.