Posted by Raj on .
Stelco has been recently legislated to reduce total SO2 emissions from iron smelting operations. Select the most effective chemical reagent to desulfurize Stelco’s gas emissions as a strategy to minimize the environmental impact of acid rain in eastern Canada and why?
CCl4, H2CO3, HCl, ClOH, or Ca(OH)2
Read the first paragraph to get acquainted. The answer is in paragraph 2.
Do I have to make equations and see which one forms a precipitate again?
I don't think its H2CO3 or HCl because that would not minimize the effect of acid rain. So its either the 2 bases or CCl4.
CCl4 + SO2 ==> CO2 + SCl4
ClOH + SO2 ==> CO2 + SOH
Ca(OH)2 + SO2 ==> CaO + S(OH)2
CCl4 is an organic solvent, not likely to react with SO2 under most circumstances. ClOH is just another way of writing HClO which is a weak acid. Didn't paragraph two of the article I linked you to say something about alkali or lime solutions being the primary ingredient of the scrubbers. Isn't Ca(OH)2 lime? And I don't see anything in your question about writing equations. If your prof wants one write one. However, what you have for Ca(OH)2 + SO2 is almost facetious. BUT, I owe you an apology for when I went back to my earlier response, there was no link there. Either I didn't leave one or it failed to post; in any event, there was no paragraph two there so I didn't give you much information at all. Here is the link. CaSO3 and CaSO4 are the products when SO2 reacts with Ca(OH)2.
(Broken Link Removed)
If the options given were:
would it be HCl or CaO?