Module 9 - Solutions V5

Question 1

Water is the solute in an aqueous solution.

Answer 1

false

Question 2

What type of compound will be most soluble in water?

Answer 2

polar

Question 3

Solutions can be formed with gaseous solvents.

Answer 3

true

Question 4

Electrolytes can be cations or anions.

Answer 4

true

Question 5

All covalent compounds will partially dissociate.

Answer 5

false

Question 6

When lithium chloride, LiCl, is dissolved in water, what cation is produced?

Answer 6

Li+

Question 7

Which of the following ions forms compounds that are always soluble in water?

Answer 7

nitrates

Question 8

All compounds containing group 1A alkali metals are soluble in water.

Answer 8

true

Question 9

Spectator ions are shown in net ionic equations.

Answer 9

false

Question 10

The products of the exchange reaction that occur when BaSO4 and KCl are mixed together are BaCl2 and…

Answer 10

K2SO4.

Question 11

PbSO4 is soluble in water.

Answer 11

false

Question 12

All compounds containing nitrate are soluble.

Answer 12

true

Question 13

The solubility of a solid increases as the solution is cooled.

Answer 13

false

Question 14

Pentane, a nonpolar covalent compound, is insoluble in water.

Answer 14

true

Question 15

Which solute would you expect to be insoluble in water? Recall, water is polar.

Answer 15

methane (nonpolar)

Question 16

Solutions are formed when multiple pure substances mix chemically.

Answer 16

false

Question 17

A solution forms when a _____ dissolves in a ______.

Answer 17

solute; solvent

Question 18

When solute-solute interactions are disrupted, it is a(n) ______ process.

Answer 18

endothermic

Question 19

Solutions like steel and bronze are proof that…

Answer 19

solutions can be in any state of matter.

Question 20

Strong electrolytes…

Answer 20

dissolve completely in water and are strong conductors of electricity.

Question 21

The ability for a solution to conduct electricity is due to…

Answer 21

the number of ions present in the solution.

Question 22

Which reaction type occurs when hydrochloric acid reacts with sodium sulfide?

2 space H C I subscript open parentheses a q close parentheses end subscript plus N a subscript 2 S subscript open parentheses a q close parentheses end subscript rightwards arrow H subscript 2 S subscript open parentheses g close parentheses end subscript plus 2 space N a C l subscript open parentheses a q close parentheses end subscript

Answer 22

gas forming reaction

Question 23

Neutralization reactions are the only reactions that can produce water.

Answer 23

false

Question 24

Which reaction types form a solid product?

Answer 24

precipitation reactions

Question 25

One of the most basic and practical precipitation reactions occurs between table salt (NaCl) and water. What is the molecular equation for this reaction?

Answer 25

NaCl + H2O → NaOH + HCl

Question 26

The presence of alkali metals means that the result of a precipitate reaction will be…

Answer 26

soluble in water

Question 27

M g subscript left parenthesis s right parenthesis end subscript space plus 2 space H to the power of plus subscript left parenthesis a q right parenthesis end subscript plus 2 space C l to the power of minus subscript left parenthesis a q right parenthesis end subscript rightwards arrow M g to the power of 2 plus end exponent subscript left parenthesis a q right parenthesis end subscript plus 2 space C l to the power of minus subscript left parenthesis a q right parenthesis end subscript plus H subscript 2 subscript left parenthesis g right parenthesis end subscript
This is an example of a…

Answer 27

complete ionic equation

Question 28

What is missing from this net ionic equation?

A g subscript left parenthesis a q right parenthesis end subscript plus C l subscript left parenthesis a q right parenthesis end subscript rightwards arrow A g C l subscript left parenthesis s right parenthesis end subscript

Answer 28

charges

Question 29

What is the net ionic equation for a reaction between sodium chloride (NaCl) and silver nitrate (AgNO3)?

Answer 29

Ag+ (aq) + Cl− (aq) → AgCl (s)

Question 30

An interesting precipitation reaction occurs when milk is combined with Coca-Cola. A key component of milk’s chemical makeup is Calcium (Ca). One component of Coca-Cola’s chemical formula is phosphoric acid (H3PO4). What are the products of the molecular equation of a reaction between calcium and phosphoric acid?

Answer 30

Ca3(PO4)2 + 3H2

Question 31

The deciding factor for polarity is the…

Answer 31

electronegativity of an atom.

Question 32

Particles moving faster with an increase in solubility is an indication of what solubility factor?

Answer 32

temperature

Question 33

Pressure has the greatest effect on the solubility of solids.

Answer 33

false

Question 34

A covalent compound with a high polarity will likely…

Answer 34

form a homogeneous mixture with water.

Question 35

An athlete makes a protein shake by adding protein powder to water. If the shake has to remain at a cold temperature, how should the athlete increase the solubility of the protein powder?

Answer 35

They should agitate the mixture by shaking.