A 0.3708 gram sample of ore contains Pb ₃ O ₄ and inert material. The lead is precipitated as PbSO ₄ and weighs 0.3699 grams. What is the % w/w Pb composition of the ore sample. Express your answer as % of Pb ₃ O ₄ in the original sample.
Assumptions: the Pb ₃ O ₄ reacts completely to form precipitate when H ₂ SO ₄ is applied to it.
You will need to write a chemical equation that is balanced in terms of the Pb atoms to determine the stoichiometry of the precipitate. ( you can safely ignore the balancing of the sulfur and oxygen )

Answer rating: 100% (QA)

Pb 3 O 4 is made up of 2 molecules of PbO and 1 of PbO 2 It can be ... View the full answer