Chapter 13 Solutions

Chapter 13 Solutions

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Checking Comprehension

Multiple Choice

What is the phase change of a solid to a liquid?

• freezing
• melting
• boiling
• condensation

Multiple Choice

Which is the opposite of condensation?

• runoff
• evaporation
• precipitation
• transpiration

Multiple Choice

What is evaporization?

• a gas becoming a liquid
• a liquid becoming a solid
• a gas becoming a solid
• a liquid becoming a gas

Multiple Choice

Sublimation is

• when solid turns into gas
• when gas turns into plasma
• when liquid turns into gas
• when gas turns into solid

Multiple Choice

________________________ have the strongest intermolecular forces of attraction.

• Dipole- Dipole

• Dispersion

• Hydrogen Bonds

Multiple Choice

Which substance would have the weakest intermolecular forces of attraction?

• CH₄

• NaCl

• H₂O

• MgF₂

Multiple Choice

Hydrogen bonding occurs when hydrogen is bonded to N, O, or F.  Which of the following has hydrogen bonding?

• CBr₄
• NO₂
• H₂S
• NH₃

Multiple Choice

What explains the very high melting and boiling point of water

• Strong dipole-dipole bonds between water molecules
• Strong hydrogen bonds between water molecules
• Dispersion forces which are present in all molecules
• Asymmetrical shape of the polar bonds.

Multiple Choice

It is the property of solid to be drawn into thin wires.

• Ductility

• Malleability

• Elasticity

• Flexibility

Multiple Choice

It is the property of solid to be hammered into thin sheets.

• Ductility

• Flexibility

• Malleability

• Elasticity

Multiple Choice

Which properties do solids have?

• definite shape and volume

• no definite shape and a definite volume

• no definite shape and no definite volume

Multiple Choice

In a liquid

• Particles are spread apart, but still relatively close

• Particles are very far apart and move past each other very quickly

• Particles vibrate to and fro

• Particles don't exist

Solutions

Multiple Choice

What does it mean to be "Soluble" ?

• Capable of being a solid.
• To have soul.
• Capable of being dissolved.
• To sink.

Multiple Choice

What is a "homogeneous mixture of two or more substances in a single phase"?

• Solution

• Solvent

• Solute

• Compound

Multiple Choice

Which of the following actions will NOT

increase the rate of dissolution

(dissolving)?

• Stirring the solution

• Decreasing the temperature

• Increasing the surface area of the

  solute

• Increasing the temperature

Multiple Choice

Which solute is the most soluble at 10 ⁰C?

• KI
• KClO₃
• NH₄Cl
• NH₃

Multiple Choice

To make a solute dissolve more quickly i n a solvent which would you do?

• Put it in cold water and stir it
• Put it in warm water and stir it

Multiple Choice

air is a 

• compound
• element
• heterogeneous mixture
• solution

Multiple Choice

What is a solvent?

• The substance that does the dissolving in a solution.
• The substance that is being dissolved in a solution.
• The mixing of different substances.
• The process in which neutral molecules lose or gain electrons

Multiple Choice

How many moles of NaCl are present in a solution with a molarity of 8.59M and 125 mL of solution?

• 1.07 gram
• 62.7 mol
• 1.07 mol
• 62.7 grams

Multiple Choice

Which solution is more concentrated?

Solution 1:

500 mL of water

100 g of salt

Solution 2:

500 mL of water

90 g of salt

• Solution 1

• Solution 2

• They have the same concentration

• I have no idea

Multiple Choice

What is the molality of a solution in which 3.0 moles of NaCl is dissolved in 1.5 Kg of water?

• 2.0 m

• 0.22 m

• 135 m

Multiple Choice

What is the percent by mass of a sugar solution where 10 grams of sugar is added to 100 grams of water?

• .10%

• 0.091%

• 9.1%

Multiple Choice

What is the percent by mass of a sugar solution where 10 grams of sugar is added to 100 grams of water?

• .10%

• 0.091%

• 9.1%

Multiple Choice

Which sample, when dissolved in 1.0 liter of water, produces a solution with the lowest freezing point?

• 0.1 mol of C₂H₅OH

• 0.1 mol of LiBr

• 0.2 mol of C₆H₁₂O₆

• 0.2 mol of CaCl₂

Multiple Choice

Which of the following solutions will have the lowest freezing point?

• 1.0 mol/L sucrose (C₁₂H₂₂O₁₁)

• 1.0 mol/L lithium chloride (LiCl)

• 1.0 mol/L sodium phosphide (Na₃P)

• 1.0 mol/L magnesium fluoride (MgF₂)

Multiple Choice

Which one of the following diagrams has the lowest vapor pressure?

• 1

• 2

• 3

• 4

• 5

Multiple Choice

Adding a nonvolatile solute to a liquid will ___.

• depress both the freezing point and the boiling point

• elevate both the freezing point and the boiling point

• depress the freezing point and elevate the boiling point

• elevate the freezing point and depress the boiling point

Multiple Choice

Adding a nonvolatile solute to a liquid will ___.

• depress both the freezing point and the boiling point

• elevate both the freezing point and the boiling point

• depress the freezing point and elevate the boiling point

• elevate the freezing point and depress the boiling point