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Unformatted text preview: = pH = -log 10 [H + ]; pure water, with a [H + ] of 10-7 M, has a pH of 7 = Addition of acids decreases pH by contributing protons to the solution = Addition of bases increases pH by removing protons from solution- Buffers are combinations of weak acids and their conjugate bases that tend to minimize the impact of addition or consumption of protons from aqueous solution. Many of the characteristic chemical and physical properties of organic molecules result from the properties of their functional groups (Tortora et al. Table 2.3; in that table, note the use of "R" to refer to the "remainder" of a molecule)- Some of these groups have ionic forms = Carboxyl groups may be be anionic at high pH = Amino gorups may be cationic at low pH- Hydroxy and carbonyl groups participate in extensive hydrogen bonding, both between and within molecules- Sulfhydryl groups are especially in formation of covalent bonds within and between polypeptide chains...
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This note was uploaded on 01/23/2012 for the course MCB MCB2010 taught by Professor Smith during the Fall '09 term at Broward College.
- Fall '09