chapter2_testbank - Chapter 2 Water Chapter 2 Water Page:...

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12 Chapter 2 Water Multiple Choice Questions 1. Weak interactions in aqueous systems Page: 43–45 Difficulty: 2 Ans: D Which of these statements about hydrogen bonds is not true? A) Hydrogen bonds account for the anomalously high boiling point of water. B) In liquid water, the average water molecule forms hydrogen bonds with three to four other water molecules. C) Individual hydrogen bonds are much weaker than covalent bonds. D) Individual hydrogen bonds in liquid water exist for many seconds and sometimes for minutes. E) The strength of a hydrogen bond depends on the linearity of the three atoms involved in the bond. 2. Weak interactions in aqueous systems Page: 48 Difficulty: 2 Ans: A A true statement about hydrophobic interactions is that they: A) are the driving force in the formation of micelles of amphipathic compounds in water. B) do not contribute to the structure of water-soluble proteins. C) have bonding energies of approximately 20–40 Kjoule per mole. D) involve the ability of water to denature proteins. E) primarily involve the effect of polar solutes on the entropy of aqueous systems. 3. Weak interactions in aqueous systems Page: 48–49 Difficulty: 2 Ans: E Hydrophobic interactions make important energetic contributions to: A) binding of a hormone to its receptor protein. B) enzyme-substrate interactions. C) membrane structure. D) three-dimensional folding of a polypeptide chain. E) all of the above are true. 4. Weak interactions in aqueous systems Page: 51 Difficulty: 2 Ans: A Dissolved solutes alter some physical (colligative) properties of the solvent water because they change the: A) concentration of the water. B) hydrogen bonding of the water. C) ionic bonding of the water. D) pH of the water. E) temperature of the water. 5. Weak interactions in aqueous systems Chapter 2 Water 13 Page: 51 Difficulty: 2 Ans: E Osmosis is movement of a: A) charged solute molecule (ion) across a membrane. B) gas molecule across a membrane. C) nonpolar solute molecule across a membrane. D) polar solute molecule across a membrane. E) water molecule across a membrane. 6. Ionization of water, weak acids, and weak bases Page: 54 Difficulty: 2 Ans: E A hydronium ion: A) has the structure H 3 O + . B) is a hydrated hydrogen ion. C) is a hydrated proton. D) is the usual form of one of the dissociation products of water in solution. E) all of the above are true. 7. Ionization of water, weak acids, and weak bases Page: 56 Difficulty: 2 Ans: A The pH of a solution of 1 M HCl is: A) 0 B) 0.1 C) 1 D) 10 E) –1 8. Ionization of water, weak acids, and weak bases Page: 56 Difficulty: 2 Ans: D The pH of a solution of 0.1 M NaOH is: A) 0.1 B) 1.0 C) 12.8 D) 13 E) 14 9. Ionization of water, weak acids, and weak bases Page: 56 Difficulty: 2 Ans: D Which of the following is true about the properties of aqueous solutions? A)
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This note was uploaded on 07/28/2011 for the course CHEM 351 taught by Professor Marsh,eneilg during the Winter '11 term at University of Michigan.

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chapter2_testbank - Chapter 2 Water Chapter 2 Water Page:...

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