1). Which of the following organic groups are found in naturally occuring amino acids?
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2). Polyprotic acids such as H3 PO4 , can act as acid-base buffers
View AnswerANS: D - at pH values around any of their pKa 's
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3). The pH of a solution is determined by
View AnswerANS: B - relative concentration of acids and bases
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4). The reactions of molecules
View AnswerANS: A - are the reactions of the functional groups
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5). Which of the following indicates that the pK of an acid is numerically equal to the pH of the solution when the molar concentration of the acid and its conjugate base are equal?
View AnswerANS: C - Henderson-Hasselbalch equation
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6). Molecules in which the atoms are held together by __________ bonds have the strongest chemical linkages.
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7). Salt dissolves well in water as water molecules
View AnswerANS: C - surround the ions because of their charge but do not form hydrogen bonds
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8). Buffer solutions
View AnswerANS: D - tend to maintain a relatively constant pH.
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9). A Bronsted acid becomes __________ upon losing a proton
View AnswerANS: C - its conjugate base
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10). Most of the important functional groups in biological molecules contain
View AnswerANS: A - oxygen and/or nitrogen and are acidic
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