posted by KELLY on .
A chemical engineer determines the mass percent of iron in an ore sample by converting the Fe to Fe^2+ in acid and then titrating the Fe^2+ with MnO4^-. A 1.3510 g sample was dissolved in acid and then titrated with 39.32 mL of 0.03190 M of KMnO4. The balanced equation is:
Calculate the mass percent of iron in the ore.
moles MnO4^- = M x L
moles Fe = moles MnO4^- x (5 moles Fe/1 mole MnO4^-) = ??
g Fe = moles Fe x atomic mass Fe.
%Fe = (mass Fe/mass sample)*100 = ??
I know this is just a problem but in real life I doubt a chemical engineer did any of this. In the U. S. at least, I think MOST would have taken the sample to the lab and told a chemist, "Here, analyze this and tell me the percent Fe."