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ACIDS BASES AND SOLUTIONS (8TH)

Total questions: 60

Worksheet time: 59mins

Name
Class
Date
1.
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
2.
Many cleaning solutions are bases. Which of the following is a property of most bases?
a)
feels slippery
b)
white color
c)
can only be liquid
d)
tastes sour
3.
Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?
a)
strongly acidic
b)
slightly acidic
c)
strongly basic
d)
slightly basic
4.
Which of the following statements is correct?
a)
Blue litmus paper turns red when placed in a base.
b)
Red litmus paper turns blue when placed in a base.
c)
Blue litmus paper stays blue when placed in an acid.
d)
Red litmus paper stays red when placed in a base.
5.
Which is the stronger acid?
a)
pH 1
b)
pH 4
c)
pH 8
d)
pH 13
6.
In a base phenolphthalein will give what color?
a)
Green
b)
Blue
c)
Pink
d)
Clear
7.
Turns litmus blue.
a)
Acids
b)
Bases
c)
Salts
d)
All
8.
Turns litmus red
a)
Acids
b)
Bases
c)
All
9.
Which has a pH above 7?
a)
Acid
b)
Base
10.
When put into a basic solution, red litmus paper ________.
a)
stays red
b)
turns blue
c)
turns magenta
d)
turns violet
11.
When put into a solution that is basic, phenolphthalein turns __________.
a)
blue
b)
violet
c)
black
d)
magenta
12.
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.
13.
Which of the following is a base?
a)
orange juice
b)
water
c)
vinegar
d)
dishwashing detergent
14.
Which of the following statements is correct?
a)
Blue litmus paper turns red when placed in a base.
b)
Red litmus paper turns blue when placed in a base.
c)
Blue litmus paper stays blue when placed in an acid.
d)
Red litmus paper stays red when placed in a base.
15.
 Which of the following is an acid?
a)
shampoo
b)
baking soda
c)
orange juice
d)
water
16.
The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been?
a)
3
b)
9
c)
7
d)
5
17.
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
18.
Values from 0-14 that determine the acidity of a solution
a)
Punnett Square
b)
Matrix
c)
pH scale
d)
Math number line 
19.
Tastes bitter.
a)
Acids
b)
Bases
c)
Salts
d)
All
20.
What is the range of pH values in an acidic solution?
a)
0-7
b)
7-14
c)
15-239058204958
d)
pH = 7
21.
Which is the stronger acid?
a)
pH 1
b)
pH 4
c)
pH 8
d)
pH 13
22.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
23.

Acids are __________, which means they "eat away" at other materials.

a)

transitional metal

b)

alkaline

c)

flammable

d)

corrosive

24.

The esophagus is the tube that connects the mouth to the stomach. Heartburn occurs when some of the stomach juices flow backwards up the esophagus. To help relieve heartburn, a person should take medicine that is (HINT HINT REMEMBER YOU HAVE ACID IN YOUR STOMACH)

a)
neutral
b)
basic
c)

acidic or basic.
d)
acidic
25.
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
26.
If an acid is combined with a base of equal strength, the result will most likely be
a)
a neutral solution.
b)
a stronger acid.
c)
impossible to tell without testing the pH.
d)
a stronger base
27.
Ammonia has a pH of 12.  Ammonia is __________.
a)
an acid
b)
a base
c)
an element
d)
a metal
28.
What does the pH scale measure?
a)

if a substance is an acid or a base

b)
the malleability of a metal
c)
the temperature of the water in a swimming pool
d)
the amount of phosphorus in a compound
29.
The pH of vinegar is 2.5.  Vinegar is a _____________.
a)
strong acid
b)
strong base
c)
weak base
d)
weak acid
30.
Which of the following is true about acids and bases?
a)
The lower the pH, the stronger the acid
b)
the higher the pH, the stronger the acid
c)
The lower the pH, the more neutral the acid
d)
The higher the pH, the weaker the base
31.
Which statement is true when acids and bases are mixed together? (a)  
Choose from the below words
acids become stronger
bases become stronger
there is no change
they neutralize each other
32.
Williams collected a rain sample and measured its pH to be 5.6.  What does this mean?
a)
the rain water is a weak base
b)
the rain water is neutral
c)
the rain water is a strong acid
d)
the rain water is a weak acid
33.

Which of the following are properties of acids but not bases? Select all that apply.

a)

Changes the color of an indicator

b)

Sour taste

c)

Reacts with metals to produce rust

d)

Feels slippery

34.

Bases have a pH of

a)

7

b)

Less than 7

c)

More than 7

35.
What is an acid?
a)
a chemical substance that neutralizes alkalis, dissolves some metals, and turns litmus paper red
b)
Has a pH of 11
c)
Has a pH of 7
36.
What is a base?
a)
Has a pH of 3
b)
Has a pH of 7
c)
substances that are slippery to the touch; turns red litmus paper blue
37.
What does a pH scale do?
a)
Tells if a substance is an acid or base
b)
Measures the strength and weakness of acids and bases
c)
Both statements are correct
38.
You can eat or drink an acid.
a)
True 
b)
False
39.
You can eat or drink a base.
a)
True
b)
False
40.
Vinegar is a base.
a)
True
b)
False
41.
What is another name for a base?
a)
Acid
b)
Alkaline
c)
pH
42.
Which of the following describes a battery?
a)
Acid 
b)
Base
43.
What is the pH of water?
a)
11
b)
4
c)
7
44.

The pH scale is used to determine the strength of

a)

acids and bases

b)

chemical bonds

c)

electrical charges

d)

particles in a solution

45.
Bases are what range on the pH scale?
a)
0-6.99
b)

1-7

c)

7-14

d)
0-14
46.
Drain cleaner has a pH of 13. What is drain cleaner?
a)
An acid.
b)
A strong base.
c)
Neutral.
d)
A weak base.
47.

The concentration of a solution refers to the

a)

molecular weight of the solvent

b)

temperature of the solution

c)

amount of solute in the solution

d)

physical state of the solution

48.

A solution with a low concentration is said to be

a)

supersaturated

b)

soluble

c)

saturated

d)

dilute

49.

If a large amount of a substance can dissolve in a solvent, it has

a)

a low solubility

b)

a high solubility

c)

unlimited solubility

d)

no solubility

50.

A solution is a mixture with ingredients that

a)

always react chemically to form a new substance

b)

cannot be physically separated from each other

c)

are spread evenly throughout

d)

clump together in solution

51.

The most common solvent is

a)

water

b)

oil

c)

oxygen

d)

salt

52.

What is true of solutions?

a)

They can be liquid only.

b)

They can be liquid or gas only.

c)

They can be liquid or solid only.

d)

They can be liquid, solid, or gas.

53.

A solution with the maximum amount of dissolved solute at that temperature is a

a)

polar solution

b)

dilute solution

c)

supersaturated solution

d)

saturated solution

54.

The mixture of gold and copper used in jewelry is

a)

a solution

b)

an ion

c)

titanium

d)

a suspension

55.
Question Image

Match the following

a)

solute

1.

A substance that dissolves into another substance is called a ____________.

b)

solution

2.

A ____________ is a homogeneous mixture in which the ingredients can be physically separated.

c)

solvent

3.

Sugar is an example of a __ because when sugar dissolves in water the entire molecule stays together

56.

Match the following

a)

pH

1.

A measure of a substance's concentration of hydrogen ions is its ____________.

b)

litmus

2.

____________ is used as an indicator of whether a solution is acidic or basic.

c)

neutral

3.

A substance with a pH of 7 is ____________.

d)

acid

4.

A substance that has a pH of 2 is a(n) ____________.

e)

base

5.

A substance that can accept a hydrogen ion is a(n) ____________.

57.
When Sally tested an unknown substance, her red litmus paper turned blue but her blue litmus paper did not change color. What is the solution?
a)
Acid
b)
Base
c)
neutral
d)
world peace
58.
Palmer puts 10 grams of salt in 100 grams of water. He then puts 50 grams of salt in 100 grams of water. Compare the concentrations of the two solutions
a)
both mixtures are acids
b)
both mixtures are bases
c)
the first solution is more diluted while the second one is more concentrated
d)
the first one is more concentrated while the second one is more diluted
59.
According to the pH scale, which of the following would be true?
a)
baking soda is a weak base while drain cleaner is a strong base
b)
lemon is a weaker acid than a banana
c)
tomato and soap are acidic
d)
vinegar is less acidic than an apple
60.
Which characteristics describe a base?
a)
sour, indicator turns red, pH less than 7, produces hydrogen ions (H+)
b)
bitter, slippery, indicator turns blue, pH greater than 7, produces hydroxide ions (OH-)
c)
neutral, pH of 7
d)
sour, indicator turns red, pH greater than 7

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