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Unit 5 Review

Total questions: 61

Worksheet time: 1hrs 13mins

Name
Class
Date
1.
At approximately what temperature does the solubility of sodium chloride, NaCl, match the solubility of potassium dichromate, K2Cr2O7?
a)
60 ºC
b)
30 ºC
c)
50 ºC
d)
83 ºC
2.
How many grams of K2Cr2O7, are soluble in 100 g of water at 95 ºC?
a)
83 grams
b)
75 grams
c)
40 grams
d)
12 grams
3.
Which substance is MOST soluble at 0 ºC?
a)
KI
b)
NaNO3
c)
NaCl
d)
Ce2(SO4)3
4.
Which solute is the most soluble at 10 ⁰C?
a)
KI
b)
KClO3
c)
NH4Cl
d)
NH3
5.
Which solute is the least soluble at 90 ⁰C?
a)
SO2
b)
KClO3
c)
KI
d)
HCl
6.
Which solute does not increase in solubility as temperature rises?
a)
NH3
b)
NaNO3
c)
KNO3
d)
NaCl
7.
When 20 grams of potassium chlorate, KClO3, is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as:
a)
supersaturated
b)
saturated
c)
unsaturated
8.
When 50 grams of KCl is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described as:
a)
supersaturated
b)
unsaturated
c)
saturated
9.
When 42 grams of potassium chloride, is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described as:
a)
supersaturated
b)
saturated
c)
unsaturated
10.
When 20 grams of KNO3 is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as:
a)
supersaturated
b)
saturated
c)
unsaturated
11.

The substance which dissolved in the solvent

a)

Dissolve

b)

Solubility

c)

Solvent

d)

Solute

12.

In a solution, the part of the mixture in which other substance are dissolved

a)

Strainer

b)

Solvent

c)

Solute

d)

Magnetism

13.

If this beaker can hold a maximum amount of 3.0 g of solute, is this beaker saturated or unsaturated?

a)

unsaturated

b)

saturated

14.

How many grams of ammonium chloride (NH4Cl) will dissolve at 60°C?

a)

70 g

b)

55 g

c)

40 g

15.

Is the following solution unsaturated, saturated, or supersaturated?


100g of NaNO3 at 30°C

a)

unsaturated

b)

saturated

c)

supersaturated

16.

How many grams of KNO3 can be dissolved at 30°C?

a)

47 g

b)

18 g

c)

10 g

17.

Is the following solution unsaturated, saturated, or supersaturated?


53g of NH3 at 20°C

a)

unsaturated

b)

saturated

c)

supersaturated

18.

Is the following solution unsaturated, saturated, or supersaturated?


10g of Ce2(SO4)3 at 10°C

a)

unsaturated

b)

saturated

c)

supersaturated

19.

How many grams of SO2 can dissolve at 50 ⁰C?

a)

5 g

b)

10 g

c)

20 g

d)

39 g

20.

Which of the following is the strongest base?

a)

oven cleaner - 13.5

b)

lemon juice - 2.5

c)

soap - 10

d)

blood - 7.4

21.

Which of the following is the weakest base?

a)

oven cleaner - 13.5

b)

lemon juice - 2.5

c)

soap - 10

d)

blood - 7.4

22.

Which of the following is the strongest acid?

a)

oven cleaner - 13.5

b)

lemon juice - 2.5

c)

soap - 10

d)

blood - 7.4

23.

Which of the following is the strongest base?

a)

soap - 10

b)

HCL - 0

c)

blood - 7.45

d)

soft drink - 3

24.

A substance is found to have the following characteristics:


Very bitter taste

Feels slippery to the touch

Produces OH- ions when dissolved in water


In what category would the substance be classified?

a)

acid

b)

base

c)

enzyme

d)

fatty acid

25.

If the substance is neutral, what would the pH be?11

a)

3

b)

5

c)

7

d)

9

e)

11

26.
Which statement is true when acids and bases are mixed together?
a)
acids become stronger
b)
bases become stronger
c)
there is no change
d)
they neutralize each other
27.

What is the pH of distilled water?

a)

pH 12

b)

pH 3

c)

pH 8

d)

pH 7

28.

Which pH levels indicated a strong acid?

a)

1-3

b)

4-6

c)

8-11

d)

12-14

29.

Which pH level indicates a strong alkali?

a)

1-3

b)

4-6

c)

8-11

d)

12-14

30.

Strong acids and alkalis are...

a)

Sour

b)

Sweet

c)

Corrosive/Caustic

d)

Burn litmus paper

31.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
32.

Which of the following substances are alkalis?

a)

Calcium hydroxide

b)

Soap

c)

Orange juice

d)

Apple cider

33.
A substance that changes color when mixed with an acid or base is a(n) ___.
a)
indicator
b)
neutralizer
c)
corrosive
d)
electricity
34.

What does pH measure?

a)

the amount of hydrogen (H+) ions

b)

the amount of hydroxide (OH-) ions

c)

amount of water

d)

all of the above

35.

Which of the following is a characteristic of a base?

a)

bitter

b)

sour

c)

corrosive

d)

releases hydrogen ions in water

36.

Which of the following is a characteristic of an acid?

a)

bitter

b)

slippery

c)

sour

d)

releases hydroxide ions in water

37.

What does a base release when placed in water?

a)

hydroxide ions (OH-)

b)

hydrogen ions (H+)

c)

ions

d)

molecules

38.

What does an acid release when placed in water?

a)

hydroxide ions (OH-)

b)

hydrogen ions (H+)

c)

ions

d)

nothing

39.

Which pH has the most hydrogen ions (H+)?

a)

2

b)

7

c)

10

d)

13

40.

Why are all ionic compounds electrolytes?

a)

because they are non-metals

b)

because they share electrons when they bond

c)

because they are electrically neutral

d)

because they dissociate into ions

41.

A substance that conducts an electrical current when dissolved in water is called

a)

catalyst

b)

metalloid

c)

electrolyte

d)

nonelectrolyte

42.

What type of solutes dissolve well in water?

a)

Non-polar solutes

b)

Ionic compounds

c)

Gaseous solutes

d)

Metallic solutes

43.

What is the charge on the hydrogen atoms in a water molecule?

a)

Positive

b)

Negative

c)

Neutral

d)

Zero

44.

What is the charge on the oxygen atom in a water molecule?

a)

Positive

b)

Negative

c)

Neutral

d)

Zero

45.

What is dissociation in the context of ionic compounds?

a)

The process of forming new compounds

b)

The process in which ionic compounds separate into ions

c)

The process of heating compounds

d)

The process of mixing compounds

46.

What attracts the negative ions of salt during dissociation?

a)

Negative ends of water

b)

Positive ends of water

c)

Neutral ends of water

d)

Positive ions of salt

47.

What is the final outcome of the dissociation process?

a)

All ions are combined

b)

All ions are separated

c)

All ions are dissolved

d)

All ions are evaporated

48.

Which part of water attracts positive ions of salt?

a)

Hydrogen ends

b)

Oxygen ends

c)

Neutral ends

d)

Both ends

49.

What type of compounds are electrolytes?

a)

Covalent compounds

b)

Ionic compounds

c)

Metallic compounds

d)

Organic compounds

50.

What happens to the kinetic energy of particles when the temperature is increased?

a)

It decreases

b)

It remains the same

c)

It increases

d)

It fluctuates randomly

51.

Which of the following is NOT a factor that affects the rate of dissolving?

a)

Solute size

b)

Solvent temperature

c)

Stirring the solution

d)

Color of the solute

52.

What is the result of increasing the surface area of the solute?

a)

Decreases contact with the solvent

b)

Increases contact with the solvent

c)

No effect on dissolving rate

d)

Reduces kinetic energy

53.

How does a smaller solute size affect the dissolving process?

a)

It decreases the surface area

b)

It increases the surface area

c)

It has no effect

d)

It reduces the solvent's effectiveness

54.

Which of the following actions will NOT increase the rate of dissolving?

a)

Stirring the solution

b)

Heating the solvent

c)

Using larger solute pieces

d)

Using smaller solute pieces

55.

What is the role of heating in the dissolving process?

a)

It decreases the solute size

b)

It increases the kinetic energy of particles

c)

It reduces the solvent's effectiveness

d)

It changes the solute's color

56.

H2OH_2O  is a ________ molecule.

a)

polar

b)

nonpolar

c)

ionic

d)

metallic

57.
Which solution would be least likely to carry an electric current?
a)
NaCl
b)
HCl
c)
C6H12O6
d)
CsI
58.

A dissolved solute that does not form ions is

a)

a nonelectroyte

b)

a weak electrolyte

c)

a strong electrolyte

d)

insoluble

59.

An electrolyte is...

a)

The rapid, random movement of particles due to magic.

b)

A substance that dissolves in water and conducts electric current.

c)

A substance that dissolves in water and does not conduct electric current.

d)

The solution process when water is the solvent.

60.
When 20 grams of potassium chlorate, KClO3, is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as:
a)
supersaturated
b)
saturated
c)
unsaturated
61.
When 50 grams of KCl is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described as:
a)
supersaturated
b)
unsaturated
c)
saturated

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