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Chemistry 9Week Exam

Total questions: 48

Worksheet time: 4hrs 22mins

Name
Class
Date
1.
What is a substance that is dissolved in another substance? 
a)
solution
b)
solute
c)
solvent
d)
compound
2.
What is a solvent?
a)
The substance that does the dissolving in a solution.
b)
The substance that is being dissolved in a solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
3.
Another name for a homogeneous mixture is 
a)
an element.
b)
a solution.
c)
a compound.
4.

A solvent

a)

present in the larger amount, substance that does the dissolving

b)

present in the smaller amount, substance that gets dissolved

c)

present in equal amounts, neither dissolves

5.

500 mL of water is placed in a beaker, 10 grams of a salt in placed in the water and stirred. All the salt dissolves. The solvent is:

a)

the water

b)

the salt

c)

the beaker

d)

the mass of the salt

6.

500 mL of water is placed in a beaker, 10 grams of a salt in placed in the water and stirred. All the salt dissolves. The solute is:

a)

the water

b)

the salt

c)

the beaker

d)

the mass of the salt

7.

What does "like dissolves like" mean?

a)

polar solvents dissolve in polar solutes

b)

polar solutes dissolve in polar solvents

c)

non-polar solvents dissolve in polar solutes

d)

non-polar solutes dissolve in polar solvents

8.
Which of the following word pairs correctly completes the sentence below?
_______ are corrosive substances characterized as having a strong smell, a sour taste, and a _______.
a)
Acids; pH less than 7
b)
Acids; pH greater than 7
c)
Bases; pH greater than 7
d)
Bases; pH less than 7
9.
Holly has an unknown substance in a beaker. She wants to determine the relative pH of the unknown substance. She places a piece of blue litmus paper into the substance, and the litmus paper stays blue.
The substance in the beaker
a)
is a base.
b)
has a neutral pH.
c)
is an acid.
d)
does not have a pH.
10.
What is neutral on the pH scale?
a)
7
b)
14
c)
P shape 
d)
H shape 
11.
Pure water has a pH of 7. Pure water _______.
a)
is a base
b)
is a neutral substance
c)
could be either an acid or a base
d)
is an acid
12.
When dissolved in water, acids produce:
a)
bases
b)
salts
c)
hydrogen ions
d)
hydroxide ions
13.

If a solution is basic which ion will be more present?

a)

H+

b)

K+

c)

OH-

d)

H-

14.

What would happen to blue litmus paper if it came into contact with an acid?

a)

It would turn red

b)

It would turn green

c)

It would stay blue

d)

It would turn pink

15.

What is the pH range of an acid?

a)

4-6

b)

1-7

c)

1-6

d)

8-14

16.

Which of the following chemical formulas is NOT an acid?

a)

HBr

b)

HF

c)

HCl

d)

LiOH

17.

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

18.

HF is...

a)

an acid

b)

a base

c)

a salt

d)

an ionic compound

19.

KOH is ...

a)

an acid

b)

a base

c)

a salt

d)

an ionic compound

20.

Which of these pH values represents an acid?

a)

4

b)

8

c)

10

d)

12

21.

Which is the Brønsted-Lowry acid in the reaction?

HCO3- + H2O → H2CO3 + OH-

a)

HCO3-

b)

H2O

c)

H2CO3

d)

OH-

22.

What is the [OH-] for a solution with a [H+] of 3.25x10-5 M?

a)

3.08x1010 M

b)

7.78x10-12 M

c)

3.08x10-10 M

d)

2.15x10-9 M

23.

Which of the following pH values represents a base?

a)

2.1

b)

4.6

c)

6.8

d)

8.1

24.

What is the molarity of a solution with 0.25 mol of HNO3 dissolved in 1.5 L of solution?

a)

6.0 M

b)

0.17 M

c)

0.38 M

d)

2.5 M

25.

Which of the following is a property of an acid

a)

bitter taste

b)

sour taste

c)

slippery feeling

d)

turns red litmus blue

26.

Which of the following is a property of a base?

a)

feels soapy

b)

corrodes metals

c)

causes burns on skin

d)

tastes sour

27.

Which would cause burns to the skin?

a)

HCl (hydrochloric ACID)

b)

NaOH (sodium hydroxide BASE)

28.

What types of chemical compounds would corrode a metal?

a)

acids

b)

bases

29.

Which types of substances have pH values that are LOW (below 7)?

a)

acids

b)

bases

30.

Which types of substances have pH values that are HIGH (above 7)?

a)

acids

b)

bases

31.

A pH of 7 is considered to be

a)

acidic

b)

basic

c)

neutral

32.

True or False. In a mixture the chemical properties of each substance are lost, and new chemical properties form

a)

True

b)

False

33.

Which of the following does NOT describe a mixture

a)

a bowl of Chex mix

b)

cereal

c)

salt and water

d)

none of the above

34.

use the picture above to describe the answer.

a)

it is a solution

b)

it is a mixture

c)

it is all of the above

d)

it is not here

35.

what type of physical property is this?

a)

a mixture

b)

a solution

c)

none of the above

d)

all of the above

36.
A cup of coffee would be considered a 
a)
mixture
b)
solution
37.

Which of the following is NOT a mixture?

a)

oxygen

b)

coins in a piggy bank

c)

bird seed

d)

Chex mix

38.

Salt can be separated from water by using

a)

tweezers

b)

sieve

c)

magnet

d)

evaporation

39.
Salt and pepper would be an example of a
a)
mixture
b)
solution
40.
If you pour sugar into hot water the sugar will
a)
disappear
b)
evaporate
c)
dissolve
d)
expand
41.

All of the buttons in this pile

a)

make the pile a mixture.

b)

can be separated with a magnet.

c)

have all the same properties.

d)

are likely to dissolve in water.

42.
Which of the following would be considered a mixture? 
a)
lemonade
b)
sweet tea
c)
trail mix
43.
A salad would be considered a _____________. 
a)
mixture
b)
solution
44.

This is an example of a

a)

Solution

b)

Mixture

45.

This is an example of a

a)

Solution

b)

Mixture

46.

This is a type of mixture where one substance dissolves into another

a)

Solution

b)

Miscibility

c)

Compound

d)

Solubility

47.

Combination of two or more different kinds of substances that keep their own physical properties and can be easily separated.

a)

Solution

b)

Mixture

c)

Solubility

d)

Miscibility

48.

All of the buttons in this pile

a)

make the pile a mixture.

b)

can be separated with a magnet.

c)

have all the same properties.

d)

are likely to dissolve in water.

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