Chapter 11 Homework Quiz

A  Unsaturated

B  Dilute

C  Supersaturated

D  Saturated

E  Concentrated

A  carbon tetrachloride, and formic acid

B  ethanol and formic acid

C  carbon tetrachloride and hexane

D  ethanol and carbon tetrachloride

E  ethanol, carbon tetrachloride, and benzene

A  Na3PO4

B  CaI2

C  CaI2, KCl and Na3PO4

D  CaI2 and KCl

E  KCl

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

B  None of these

C  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.

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

E  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.

A  7.19 mm Hg

B  12.8 mm Hg

C  5.61 mm Hg

D  2.84 mm Hg

E  10.0 mm Hg

A  liquid / gas

B  solid / solid

C  gas / gas

D  liquid / liquid

E  gas / liquid

A  Cannot tell from the information provided

B  Exothermic

C  Endothermic

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

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

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

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

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

A  –0.50 °C

B  –0.25 °C

C  0.50 °C

D  0.25 °C

E  –1.00 °C

A  0.35 m CH4N2O

B  0.16 m BaI2

C  0.10 m Cr2(SO4)3

D  0.15 m Zn(CH3COO)2

E  pure water

A  Occurs only when ionic solids are present

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

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

D  Occurs only at sea level

E  Occurs only for molecular solutes

A  1.02 × 103 g

B  5.67 g

C  0.676 g

D  122 g

E  0.698 g

A  2 × 10–6 atm

B  7.3 × 10–6 atm

C  3.5 × 100 atm

D  1.1 × 100 atm

E  3.5 × 100 atm

F  2.9 × 10–1 atm

A  0.00146 m

B  0.0282 m

C  1.61 m

D  0.0882 m

E  0.0968 m

A  0.17

B  none of these

C  6.3

D  0.056

E  0.35