25g of a sample of ferrous sulphate was dissolved in water containing dilute h2s04 and the volume made up to one litre. 25ml of this solution required 20ml of N/10 kmn04 solution for complete oxidation. Calculate the percentage of fes047h20 in the sample
the right answer 88.96%
My calculation
0.02L x 0.1 = 0.002
0.002 x 1000 /25 =0.08 x 293g/mol /25g x 100% = 93.76%