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Name:_______________________ CHEM 22 5 0 Organic Chemistry I Fall 2018 September 26 , 2018 Quiz # 2
1 bonus point
M7. Rank the following compounds in order of increasing acidity, putting the least acidic first. A) III < I < IV < II B) III < IV < I < II C) II < I < IV < III D) III < I < II < IV M8. Rank the indicated protons in decreasing order (most to least) of acidity. A) II>I>III B) II>III>I C) I>III>II D) I>II>III E) III>II>I M9. If an amino acid is dissolved in water and the pH of the solution is adjusted to 1, which is the predominate species present? M10. The pKa of CH 3 COOH is 4.8. If the pH of an aqueous solution of CH 3 COOH and CH 3 COO
]. C) [CH 3 COOH] = [CH 3 COO-]. D) [CH 3 COOH] < [CH 3 COO-]. E) CH 3 COOH is completely unionized. M11. When a small amount of hexanoic acid [CH 3 (CH 2 ) 4 CO 2 H, pKa~4.8], is added to a separatory funnel which contains the organic solvent diethyl ether and water with a pH of 2.0, it is found mainly in the ________ phase as ________. A) ether; CH 3 (CH 2 ) 4 CO 2 - B) water; CH 3 (CH 2 ) 4 CO 2 - C) ether; CH 3 (CH 2 ) 4 CO 2 H
D) water; CH 3 (CH 2 ) 4 CO 2 H E) none of the above