Chapter 11 Homework Quiz

A  Supersaturated

B  Unsaturated

C  Saturated

D  Dilute

E  Concentrated

A  ethanol, carbon tetrachloride, and benzene

B  ethanol and formic acid

C  ethanol and carbon tetrachloride

D  carbon tetrachloride and hexane

E  carbon tetrachloride, and formic acid

A  CaI2 and KCl

B  Na3PO4

C  CaI2

D  CaI2, KCl and Na3PO4

E  KCl

A  The process of separating water molecules from water molecules (step 2) is exothermic thus favoring a spontaneous process.

B  The process of separating the ammonium ions from the nitrate ions in the crystal lattice of NH4NO3 (step 1) is exothermic thus favoring a spontaneous process.

C  The process is spontaneous because the overall solution upon mixing is more disordered than the pure substances NH4NO3 and water (the entropy factor), even though the overall mixing process is endothermic.

D  None of these

E  Steps 1 and 2 are both exothermic and thus the process is spontaneous.

A  2.84 mm Hg

B  10.0 mm Hg

C  7.19 mm Hg

D  12.8 mm Hg

E  5.61 mm Hg

A  solid / solid

B  liquid / gas

C  gas / liquid

D  gas / gas

E  liquid / liquid

A  Endothermic

B  Exothermic

C  Cannot tell from the information provided

A  Nothing happens, because sodium fluoride is insoluble in water.

B  The solid undergoes a chemical change by reacting with the water.

C  The heat from the warm water melts the solid, making it a liquid.

D  The water molecules surround each ion in the solid NaF, separating the Na ions from the F ions.

E  The solid NaF breaks apart into separate Na and F atoms by interacting with the water molecules.

A  0.25 °C

B  –1.00 °C

C  0.50 °C

D  –0.25 °C

E  –0.50 °C

A  0.35 m CH4N2O

B  pure water

C  0.15 m Zn(CH3COO)2

D  0.10 m Cr2(SO4)3

E  0.16 m BaI2

A  Occurs only at sea level

B  Occurs only when ionic solids are present

C  Occurs only for molecular solutes

D  Is the change in boiling point observed when one goes to a higher elevation

E  Results from a reduction in the vapor pressure of the solution

A  5.67 g

B  1.02 × 103 g

C  0.698 g

D  0.676 g

E  122 g

A  1.1 × 100 atm

B  7.3 × 10–6 atm

C  2 × 10–6 atm

D  3.5 × 100 atm

E  3.5 × 100 atm

F  2.9 × 10–1 atm

A  0.00146 m

B  1.61 m

C  0.0882 m

D  0.0968 m

E  0.0282 m

A  0.056

B  0.17

C  0.35

D  none of these

E  6.3