Unit 1 - Bound Resiudes 2019 Part 2.doc

Unit 1 - Bound Resiudes 2019 Part 2.doc - NRS 412...

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NRS 412 - Soil-Water Chemistry Spring 2019 Part 2 - An Unextractable Problem Being a bright, young soil chemist, Al D. Hyde has moved on to other, less speculative and more profitable projects – he has no time to figure out how these unextractable residues come about. So your boss, Pedro Greenjeans, has asked you to figure out what is going on with this stuff. Al has given Pedro a sample of soil containing unextractable residues of uniformly- 13 C- labeled p -chloroaniline (PCA). Lou Zine, a fellow soil chemist, overhears your conversation with Mr. Greenjeans and decides to chime in: “With all due respect, Pedro, I don’t think there’s much to do here. You don’t have to be a rocket scientist (not that it would help) to figure out that what’s going on is adsorption of organic cations to soil – plain, old cation exchange. All of these aromatic amines can be protonated to produce a positive charge. Their pK b values are perfect for protonation at normal soil pH. Once you’ve
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  • Spring '19
  • JoseAmador
  • Chemistry, Atom, Class Work, Pedro Greenjeans, Al D. Hyde

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