Qindan
This page lists questions and answers that were posted by visitors named Qindan.
Questions
The following questions were asked by visitors named 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) W...
12 years ago
The equation for the reaction that occurs when lead(II) oxide is heated with coke in a blast furnace is: 2PbO+c -->2Pb+CO2 (i)State, with a reason, whether PbO is oxidised or reduced in this reaction. (ii)Calculate the minimum mass, in tonnes, of coke nee...
12 years ago
Galena(PbS) and cerussite(PbCO3)are two ores of lead. A mining company is considering which of these two ores to use for the extraction of lead. The equations for the reactions occurring are process using galena: 2PbS+3O2 ---> 2PbO+2SO2 2PbO+C ----> 2Pb+C...
12 years ago
Answers
The following answers were posted by visitors named Qindan.