group_review_3 - Chem 008 Group Review Session III updated...

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Chem 008 Group Review Session III updated 4/6/2007 4/5/2007 brought to you by the Department of Chemistry and the Learning Strategy Center 1) Which of the following does not give a buffer solution when equal volumes of the two solutions are mixed? a. 0.10M CH 3 COOH + 0.10 M CH 3 COONa b. 0.20 M CH 3 COOH + 0.10 M NaOH c. 0.10 M HCl + 0.20 M CH 3 COONa d. 0.20 M CH 3 COOH + 0.20 NaOH 2) Which of the following dissolves in water yielding an acidic solution? NH 4 Cl NaCl Na 2 CO 3 Mg(OH) 2 3) Cocaine (C 17 H 24 NO 4 , MW = 206 g/mol) is a pharmacologically active amine with a pK b = 5.59 at 25°C. The maximum solubility of cocaine is 1.0 g per 600 mL of H 2 O. a. Calculate the pH of a saturated solution of cocaine in water. b. What percentage cocaine is protonated in water? 4) Ephedrine, C 10 H 15 NO, is a central nervous system (CNS) stimulant what was originally derived from the plant Ephedra vulgaris . Its common use as a bronchodilator is found in the chemical isomer pseuodophedrine, and until
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group_review_3 - Chem 008 Group Review Session III updated...

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