BIOL-1100 Lecture 4: Ch4 Lecture Notes
9 Mar 2017
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Ka is the equilibrium ratio of [products] over [reactants for] the dissociation of a weak acid (after taking out water): h20+ ha h+ + a- What is the ph of a 4. 2e -3 m solution of hcl (stong acid): ph= 2. 38. Log (4. 2e -3(cid:524) because it"s a strong acid that completely dissociates. What is the ph of a 0. 01 m solution of acetic acid (pka= 4. 76): ph= 3. 38. Learning outcomes: compare and contrast structure and function of the 4 classes of organic molecules. Identify organic molecules to type using structural motifs (repeating patterns: relate organic molecules to function. Hydrocarbon chain forms zigzag pattern (propane c3h8) Structural isomeres: same molecular formula, different primary bonds, glucose (c6h12o6) and fructose (c6h12o6) Stereoisomers: same molecular formula, same primary bonds, diff spatial arrangement, glucose (c6h12o6) and galactose (c6h12o6, anomers, cyclic arrangement in water, enantiomers, 2 molecules identical but mirror images.
