Module 13 Chemistry

Question 1

Which of the following are factors that affect the rate of dissolving?
agitation
temperature
surface area
all of the above

Answer 1

all of the above

Question 2

When two liquids can be mixed in any proportion they are said to be completely _____ .
saturated
immiscible
miscible
unsaturated

Answer 2

miscible

Question 3

The energy associated with the dissolving of a solute in a solvent is called ____ .
combustion
heat of solution
conflagration
entropy of solvation

Answer 3

heat of solution

Question 4

A mixture with large, “settling” particles:
Suspension
Colloid
Emulsion
Mayonnaise

Answer 4

Suspension

Question 5

The mixing of sand and water results in …
a colloid
a homogeneous solution
a suspension
an emulsion

Answer 5

a suspension

Question 6

What is the molarity of 2 mol solute dissolved in 500 mL solvent?
2 M
0.5 M
2.5 M
4 M

Answer 6

4 M

Question 7

What is the saturation point of sodium nitrate at Standard Conditions (298K)? (There is a picture of graph that I have on my phone for this question.)
92g per 100g
40g per 100g
70g per 100g
5g per 100g

Answer 7

92g per 100g

Question 8

A suspension with medium-sized, non-settling particles:
Colloid
Solution
Colligation
Homogeneous

Answer 8

Colloid

Question 9

Which has a greater colligative effect? (Assume each dissolves and dissociates completely.)
1 mol NaC2H3O2
1 mol KNO3
1 mol CaCl2
1 mol NaCl

Answer 9

1 mol CaCl2 (because it has three ions, while the others only have 2)

Question 10

The strongest electrolyte:

Would always be the most soluble in water
Would have the least conductivity per mol
Would dissociate the most in water
Would be the most nonpolar

Answer 10

Would dissociate the most in water

Question 11

The depression of freezing point based on addition of solute is a:
Colligative property
Property of water
Cohesive tendency
Abomination of nature

Answer 11

Colligative property

Question 12

How many moles are present in a saturated solution of HCl at Standard Conditions (298K)? (Picture of graph on my phone)
1.892 mol
2520 mol
0.514 mol
1.2 mol

Answer 12

1.892 ml

Question 13

One major difference between colloids and suspensions is:
Colloids have smaller particles
Colloids have larger particles
Colloids are non-uniform
Colloids will settle over time

Answer 13

Colloids have smaller particles

Question 14

The solubility of a solute depends …
only on the temperature of the solvent.
only on the nature of the solute.
on the nature of the solute and the temp of the solvent
none of the above

Answer 14

on the nature of the solute and the temp of the solvent

Question 15

Decreasing the temperature _________ the solubility of a gas in a liquid.
increases
decreases
does not affect

Answer 15

increases

Question 16

True or False: Dissolving is a synonym for dissociating.

True
False

Answer 16

False

Question 17

A weak electrolyte …
is very dilute.
cannot conduct electricity when dissolved in water.
only partially dissociates when dissolved.
example would be sugar.

Answer 17

only partially dissociates when dissolved.

Question 18

Two mL of water are added to 48 mL of alcohol. What is the term for the alcohol?
solvent
solute
solution

Answer 18

solvent (because there is more alcohol than water)

Question 19

A supersaturated solution …

-has the exact amt of solute that should dissolve @ a given T
-must have a strong electrolyte as its main component
-has more solute dissolved than it should at a given temp
-has excess solute that will never dissolve

Answer 19

has more solute dissolved than it should at a given temp

Question 20

Dissolving a nonvolatile solute in a solvent has what effect?
Boiling Point Elevation
Vapor Pressure Lowering
Freezing Point Depression
All of the Above

Answer 20

All of the above

Question 21

To keep a fat mixed in water one would use a(n) …
emulsifier
hot plate
blender
indicator

Answer 21

emulsifier

Question 22

What is another name for the dissolving process?
salutation
salvation
solvation
saturation

Answer 22

solvation

Question 23

The property of a solute that describes its ability to dissolve in a solvent.

solubility
dissociation
solidarity
decomposition

Answer 23

solubility

Question 24

Which pair are opposites?
dilute/concentrated
weak/dilute
concentrated/strong
strong/dilute

Answer 24

dilute/concentrated

Question 25

A method to distinguish between a true solution and a colloid.

The Photoelectric Effect.
The Carbonaro Effect.
The Doppler Effect.
The Tyndall Effect.

Answer 25

The Tyndall Effect.

Question 26

What volume of stock 2.0M NaOH solution should be used to prepare 500. mL of 0.10M NaOH?

0.025 mL
0.25 mL
2.5mL
25 mL

Answer 26

25 mL

Question 27

The solubility (S) of CO2 under 4 atm pressure in soda is 0.12M. What is the S at 0.0004 atm?

0.000012 M
0.0012 M
0.12 M
CO2 can’t dissolve in water

Answer 27

0.000012 M

Question 28

Which statement/reason combo is true of the conductivity of table sugar/water solution?

Sugar is an electrolyte because it dissociates.
Sugar is a nonelectrolyte because it doesn’t dissociate.
Sugar is an electrolyte because it dissolves.
Sugar is a nonelectrolyte because it doesn’t dissolve.

Answer 28

Sugar is a nonelectrolyte because it doesn’t dissociate.