05-11-2018, 03:38 PM

A 0.3874 gram sample of ore contains Pb3O4 and inert material. The lead is precipitated as PbSO4 and weighs 0.3202 grams. What is the %w/w Pb composition of the ore sample? Express answer as % Pb3O4 in original sample. Assume Pb3O4 reacts completely to form precipitate when H2SO4 is applied to it. Write balanced chemical equation.

I'm unsure what to do here. Would I just subtract 0.3202 from the original sample weight of 0.3874, and divide that number by 0.3874 (multiplied by 100) or are there different ratios I need to take into account? I'm confused.

I'm unsure what to do here. Would I just subtract 0.3202 from the original sample weight of 0.3874, and divide that number by 0.3874 (multiplied by 100) or are there different ratios I need to take into account? I'm confused.