posted by Qindan .
Lead can be extracted from lead(II) sulfide, PbS, in two stages.
Stage 1: Lead(II) sulfide is heated in air. It reacts with oxygen to produce lead(II) oxide and sulfur dioxide.
Stage 2: The Lead(II) oxide is then heated in a blast furnace with coke.
(a) Write a chemical equation for the reaction in Stage 1.