Chemistry 2210A/B Lecture Notes - Lecture 4: Smog, Chch-Dt, Particulates
16 Oct 2014
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Chapter 4: consequences of polluted air outdoors and indoors. Acid rain: natural rain is acidic due to dissolved co2. Co2(g) + h2o(aq) h2co3(aq: h2co3 is a weak diprotic acid. H2co3(aq) h+(aq) + hco3 ph of natural rain is about 5. 6. True acid rain has a ph of less than 5: many other acids (and bases) can contribute to the ph of natural rain. Some atmospheric so2 is deposited directly on land by dry deposition. Large amounts of nh3 result in deposition of nh4. + no3: nh4, h+ (acid) is produced in this reaction. Acid rain around the world ph of 6. 0 is normal, anything less than 5. 0 is considerably acidic. Acidity on the east coast is due to so2. Acidity on the west coast is due to no. Neutralization of acid rain: by soil: not all soil or lake types become acidified by acid rain. Soil/lakes containing limestone neutralize the acidity: caco3(s) + h+(aq) ca2+(aq) + hco3(aq)
