chapter 12

Liquids that vaporize easily and have high vapor pressures are known as _____.

• volatile liquids

   

• explosive liquids

• cohesive liquids

• adhesive liquids

• nonvolatile liquids

Substance A contains stronger cohesive forces than substance B. Which of the following statements is true?

• Substance A will have a higher boiling point and higher vapor pressure than substance B.

• Substance A will have a lower boiling point and lower vapor pressure than substance B.

  
  

• Substance A will have a lower boiling point and higher vapor pressure than substance B.

• Substance A will have a higher boiling point and lower vapor pressure than substance B.

• Substance A will have the same boiling point and vapor pressure as substance B.

Which of these substances has/have the lowest boiling point? (think about molar mass)

look concept of 12.1 notes

• F₂

• Br₂

• I₂

• Cl₂

• Cl₂ and I₂

  
  

A solution is made by adding 1.25 moles of NaCl to 3.0 liters of solution.  What is the molarity (M) of this solution?

1.25/3.0=

•  

  0.42 M

•  

  2.4 M

_____ is a naturally occurring process in which water flows from an area of low solute concentration to one of high solute concentration.

• Osmosis

• Aeration

• Filtering

• Softening

• Coagulation

Which of these correctly describes a solid with a well-ordered structure?

• Cohesive

• Crystalline

• Amorphous

• Neat

• Compressed

Arrange CH₄, Cl₂, and CO₂ in order of increasing strength of dispersion forces (least to the greatest).

• CH₄< CO₂< Cl₂

• Cl₂< CO₂ <CH₄

• CH₄< Cl₂< CO₂

• Cl₂<CH₄< CO₂

•  

  CO₂ < Cl₂<CH₄

Hydrogen bonding occurs between H of one molecule and the N, O or F of another molecule.

• true

• false

Which of these elements is/are the primary component(s) in hard water?

I. Magnesium

II. Iron

III. Calcium

IV. Sodium

• I only

• III only

• II and III

• I and III

• II and IV

Which of these statements about water is correct?

• Water has a high boiling point.

• Water expands when it freezes.

• Water is the most abundant liquid on the planet.

• Water molecules form hydrogen bonds.

• All of these are correct statements.