Chemistry & Chemical Reactivity 9th Edition By John C. Kotz – Test Bank

1. Which of the following correctly describes the states of matter and intermolecular forces?
1. The change in volume that accompanies the conversion of a liquid to a gas can be very large.
2. The change in volume that accompanies the conversion of a liquid to a solid is small.
3. The forces of attraction between molecules in the liquid and solid state correlate with melting point, boiling point, and the energy of phase changes.
a. 1 only b. 2 only c. 3 only d. 1 and 2 e. 1, 2 and 3
ANSWER: e
POINTS: 1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS: 11.1 States of Matter and Intermolecular Forces
QUESTION ID: JFND-GO4R-EC3D-YP3S

2. Which of the following correctly describes the influence of intermolecular forces on the properties of matter?
1. Intermolecular forces determine the solubility of gases, liquids, and solids in various solvents.
2. Intermolecular forces are directly related to the energy required to accomplish phase changes.
3. Intermolecular forces do not influence the structure of molecules like DNA and proteins.
a. 1 only b. 2 only c. 3 only d. 1 and 2 e. 1, 2 and 3
ANSWER: d
POINTS: 1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS: 11.1 States of Matter and Intermolecular Forces
QUESTION ID: JFND-GO4R-EC3D-YP3I

3. Which of the following statements concerning the attraction of ions to polar molecules is/are CORRECT?
1. The energy of attraction between an ion and a polar molecule is inversely proportional to the square of the distance between the center of the ion and the oppositely charged pole of the dipole.
2. The higher the ion charge, the stronger the attraction between the ion and a polar molecule.
3. The greater the magnitude of the dipole, the greater the attraction between the ion and a polar molecule.
a. 1 only b. 2 only c. 3 only d. 2 and 3 e. 1, 2, and 3
ANSWER: e
POINTS: 1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS: 11.2 Interactions between Ions and Molecules with a Permanent Dipole
QUESTION ID: JFND-GO4R-EC3D-YP3W

4. A molecule will always be polar if it ___.
a. has polar bonds
b. contains both carbon and chlorine
c. consists of more than three atoms
d. is diatomic with different electronegativities
e. contains atoms with different electronegativities
ANSWER: d
POINTS: 1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS: 11.2 Interactions between Ions and Molecules with a Permanent Dipole
QUESTION ID: JFND-GO4R-EC3D-YPNN

5. Which of the following statements best describes what happens when a small amount of solid lithium fluoride is dissolved in water?
a. The heat from the warm water melts the solid, making it a liquid.
b. Nothing happens, because lithium fluoride is insoluble in water.
c. The solid LiF breaks apart into separate Li and F atoms by interacting with the water molecules.
d. The water molecules surround each ion in the solid LiF, separating the Li ions from the F ions.
e. The solid undergoes a chemical change by reacting with the water.
ANSWER: d
POINTS: 1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS: 11.2 Interactions between Ions and Molecules with a Permanent Dipole
NOTES: Dynamic Question
QUESTION ID: JFND-GO4R-EC3D-YPNB

6. Which one of the following statements is false?
a. All ions are hydrated in aqueous solution.
b. All cations are hydrated in aqueous solution.
c. All anions are hydrated in aqueous solution.
d. Hydration is generally highly endothermic for ionic compounds.
e. The heats of hydration of cations increases as their charge-to-radius ratios increase.
ANSWER: d
POINTS: 1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS: 11.2 Interactions between Ions and Molecules with a Permanent Dipole
QUESTION ID: JFND-GO4R-EC3D-YPB3

7. Place the following cations in order from the most negative to the least negative hydration enthalpy: H+, Rb+, and Li+.
a. Rb+ < Li+ < H+
b. Rb+ < H+ < Li+
c. H+ < Li+ < Rb+
d. H+ < Rb+ < Li+
e. Li+ < H+ < Rb+
ANSWER: c
POINTS: 1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS: 11.2 Interactions between Ions and Molecules with a Permanent Dipole
NOTES: Dynamic Question
QUESTION ID: JFND-GO4R-EC3D-YPBA

8. Which of the following strong electrolytes has the least negative hydration enthalpy?
a. NaI b. KI c. RbI d. CsI
e. HI
ANSWER: d
POINTS: 1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS: 11.2 Interactions between Ions and Molecules with a Permanent Dipole
NOTES: Dynamic Question
QUESTION ID: JFND-GO4R-EC3D-YPNG

9. Place the following cations in order from the lowest to the highest hydration enthalpy: K+, Ca2+, and Mg2+.
a. K+ < Ca2+ < Mg2+
b. Mg2+ < Ca2+ < K+
c. Ca2+ < K+ < Mg2+
d. Ca2+ < Mg2+ < K+
e. Mg2+ < K+ < Ca2+
ANSWER: a
POINTS: 1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS: 11.2 Interactions between Ions and Molecules with a Permanent Dipole
QUESTION ID: JFND-GO4R-EC3D-YPNF

10. Which one of the following sets of ions are listed in order of lowest to highest hydration energy?
a. H+ < Na+ < Mg2+
b. Mg2+ < Ca2+ < Ba2+
c. Mg2+ < Ba2+ < Ca2+
d. Ca2+ < K+ < Rb+
e. Rb+ < K+ < Ca2+
ANSWER: e
POINTS: 1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS: 11.2 Interactions between Ions and Molecules with a Permanent Dipole
QUESTION ID: JFND-GO4R-EC3D-YPNR