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acids, bases, and indicators

Total questions: 100

Worksheet time: 2hrs 6mins

Name
Class
Date
1.

Which of the following is NOT a property of ACIDS

a)

tastes sour

b)

has a pH between 8 and 14

c)

feels sticky

d)

reacts with metals

2.

A students tests a substance using red litmus paper and phenolpthalein. The phenolpthalein stayed colorless while the red litmus paper turned violet. What kind of substance was being studied?

a)

acid solution

b)

base solution

c)

neutral solution

d)

salt solution

3.

Which of the following is an example of a substance that has a neutral pH?

a)

lemon juice

b)

water

c)

lysol

d)

vinegar

4.

A student is studying a substance that tastes bitter and is slippery to touch. When phenolpthalein is added is turns magenta. What is the student most likely studying?

a)

water (neutral)

b)

lemon juice (acid)

c)

drain cleaner (base)

d)

salt solution (neutral)

5.

Which of the following is NOT a property of a base?

a)

when mixed with an acid it becomes neutralized

b)

slippery to touch

c)

measures 8-14 on the pH scale

d)

reacts with metals

6.

a substance is found to turn phenolpthalein magenta (pink). Predict what will happen when blue and red litmus paper is placed into the substance.

a)

the blue litmus will stay blue and the red litmus will stay red

b)

the blue litmus will stay blue and the red litmus will turn blue

c)

the blue litmus will turn red and the red litmus will stay red

d)

the blue litmus will turn red and the red litmus will turn blue

7.

a student measures the pH of a substance using pH paper. It turns a dark blue and is determined to have a pH of 13. Which of the following best describes this substance?

a)

strong base

b)

strong acid

c)

weak base

d)

weak acid

8.
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
9.

Vinegar, fruit juice, and cola are examples of:

a)

salts

b)

neutral substances

c)

bases

d)

acids

10.

Milk is a very weak acid. What might its pH value be?

a)

6.5

b)

7.8

c)

4.2

d)

12.2

11.

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

12.

According to the pH scale, which item is a stronger base than soap?

a)

baking soda

b)

ammonia solution

c)

tomato

d)

bleach

13.

What corrodes metal?

a)

acid

b)

base

c)

both

d)

neither

14.

What is produced from the neutralization of an acid and base?

a)

salt and water

b)

NaCl only

c)

hydrogen

d)

nitrogen

15.

What is the colour of litmus in an acid ?

a)

Pink

b)

Yellow

c)

Red

d)

Colourless

16.

What is the colour of litmus in a base ?

a)

Pink

b)

Blue

c)

Red

d)

Colourless

17.
Neutralization reactions
a)
formed from joining positive and negative ions 
b)
increases OH ions
c)
froms a salt and water
d)
increases H2O ions
18.

When you place blue litmus paper into an unknown clear solution, the blue litmus paper turns red.

Which of the following represents the most logical conclusion?

a)

The substance has a pH value of "2".

b)

The substance is a base.

c)

The substance has a pH value of "7".

d)

The substance is acidic.

19.
What do bases do to red litmus paper?
a)
Turn it Red 
b)
Turn it Blue
c)
Turn it Yellow
d)
Turn it Green
20.
What is the name of the following acid: HCl
a)
hydrochloric acid
b)
chloric acid
c)
perchloric acid
d)
chlorous acid
21.
What is the name of the following acid: HNO3
a)
hydronitric acid
b)
nitric acid
c)
nitrous acid
d)
hydronitrous acid
22.

Which of the following pH is strongly acidic?

a)

5.0

b)

14

c)

9.5

d)

1.0

23.

Examine the results (color change) of the pH paper shown in the picture. What type of substance was tested?

a)

an acid

b)

a base

c)

a neutral substance

d)

none of the above

24.

Which one of the following is neutral?

a)

HCl

b)

HBr

c)

LiOH

d)

LiBr

25.

Which one of the following is an acid?

a)

NaOH

b)

NaCl

c)

HCl

d)

BaO

26.

Which of the following is a base?

a)

Mg(OH)2

b)

MgO

c)

HNO3

d)

Cu(NO3)2

27.

Packing peanuts do not dissolve in water, therefore you can assume that packing peanuts are probably ____________.

a)

non polar

b)

polar

c)

acidic

d)

basic

28.

Fingernail polish does not dissolve in water.

Acetone dissolves fingernail polish, therefore you can assume acetone is ______.

a)

polar

b)

non polar

c)

basic

d)

acidic

29.
Bases will turn litmus paper __________, while acids will turn litmus paper __________.
a)
blue.....red
b)
red.....blue
c)
pink.........colourless
d)
colourless..........pink
30.
The pH of a strong acid would be:
a)
1-2
b)
5-6
c)
8-9
d)
12-13
31.
The pH of a strong base would be:
a)
1-2
b)
5-6
c)
8-9
d)
13-14
32.

Indicators are substances that changes color when exposed to solutions with different pH values.

a)

True

b)

False

33.

What is the color of litmus indicator in a solution with pH 3?

a)

blue

b)

red

34.

What is the color of phenolphthalein in a solution with pH 12?

a)

colorless

b)

pink

35.

What is the color of phenolphthalein in a solution with pH 6?

a)

colorless

b)

pink

36.

What is the color of bromothymol blue in a solution with pH 5?

a)

yellow

b)

blue

37.

What is the color of methyl orange in a solution with pH 5?

a)

yellow

b)

red

38.

What is the color of methyl orange in a solution with pH 10?

a)

yellow

b)

red

39.

What is the color of bromocresol green in a solution with pH 7?

a)

yellow

b)

blue

40.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
41.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
42.
Complete the sentence.
A substance that is more basic has a _____ pH than a substance that is acidic.
a)
lower
b)
higher
c)
the same
d)
none of the above
43.

In a test of pH levels, a baking soda has a pH of 9 and bleach has a pH of 12. What is true about there relationship?

a)

Both of the solution are Bases

b)

Both of the solution are Acids

c)

The Baking soda is an acid and the Bleach is a base

d)

The baking soda is a base and the Bleach is an Acid.

44.

A base is a substance

a)

That releases OH- ions when dissolved in water

b)

That releases H+ ions when dissolved in water

c)

Does not release any ions when dissolved in water

d)

None of the above

45.

A pH of 3 is how many times more acidic than a pH of 5?

a)

2

b)

20

c)

10

d)

100

46.

An acid

a)

is a substance that releases H+ ions when dissolved in water

b)

is a substance that does not release any ions when dissolved in water

c)

is a substance that releases OH- when dissolved in water

d)

releases an equal amount of OH- and H+ ions when dissolved in water

47.

Water is neutral because

a)

it has more H+ ions than OH-

b)

it has more OH- ions than H+

c)

it does not produce any ions

d)

it has an equal amount of H+ and OH- in solution

48.

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

49.

A pH of 8 is how many times more acidic than a pH of 11?

a)

3

b)

30

c)

100

d)

1000

50.
What do acids do to red litmus paper?
a)
Turn it Red 
b)
Turn it Blue
c)
Turn it Yellow
d)
Turn it Green
51.
What do bases do to red litmus paper?
a)
Turn it Red 
b)
Turn it Blue
c)
Turn it Yellow
d)
Turn it Green
52.
What do bases do to blue litmus paper?
a)
Turn it Red 
b)
Turn it Blue
c)
Turn it Yellow
d)
Turn it Green
53.
What do acids do to blue litmus paper?
a)
Turn it Red 
b)
Turn it Blue
c)
Turn it Yellow
d)
Turn it Green
54.
What do acids do to bromothymol blue?
a)
Turn it Red 
b)
Turn it Blue
c)
Turn it Yellow
d)
Turn it Green
55.
What do bases do to bromothymol blue?
a)
Turn it Red 
b)
Turn it Blue
c)
Turn it Yellow
d)
Green
56.
What do bases do to phenolphthalein?
a)
Turn it Red 
b)
Turn it Blue
c)
Turn it Purple/Pink
d)
Turn it Green
57.
What do acids do to phenolphthalein?
a)
Turn it Red 
b)
Turn it Blue
c)
Turn it Purple/Pink
d)
Turn it Clear
58.
What do acids do to universal indicator?
a)
Red 
b)
Blue
c)
Yellow
d)
Green
59.
What do acids do to universal indicator?
a)
Red 
b)
Blue
c)
Yellow
d)
Green
60.
HCl, Sprite, & Lemon Juice are...
a)
Acidic 
b)
Basic
c)
Neutral
d)
Acidic and Basic
61.
NaOH, Ammonia, & Bleach are...
a)
Acidic 
b)
Basic
c)
Neutral
d)
Basic and Acidic
62.
Which of the following is a positive for  an acid
a)
Red Litmus paper staying red
b)
Red Litmus paper turning blue
c)
Phenolphthalein being purple
d)
Bromothymol blue turning blue
63.
Which of the following is a positive for  an acid
a)
Blue Litmus paper staying blue
b)
Red Litmus paper staying red
c)
Phenolphthalein being purple
d)
Bromothymol blue turning blue
64.
Which of the following is a positive for  an acid
a)
Red Litmus paper turning blue
b)
Blue Litmus paper staying blue
c)
Phenolphthalein being clear
d)
Bromothymol blue turning blue
65.
Which of the following is a positive for  an acid
a)
Red Litmus paper turning blue
b)
Blue Litmus paper staying blue
c)
Phenolphthalein being purple
d)
Bromothymol blue turning yellow
66.
Which of the following is a positive for  an base
a)
Red Litmus paper turning blue
b)
Blue Litmus paper turning red
c)
Phenolphthalein being clear
d)
Bromothymol blue turning yellow
67.
Which of the following is a positive for  an base
a)
Red Litmus paper staying red
b)
Blue Litmus paper staying blue
c)
Phenolphthalein being clear
d)
Bromothymol blue turning yellow
68.
Which of the following is a positive for  an base
a)
Red Litmus paper staying red
b)
Blue Litmus paper turning red
c)
Phenolphthalein turning purple
d)
Bromothymol blue turning yellow
69.
Which of the following is a positive for  an base
a)
Red Litmus paper staying red
b)
Blue Litmus paper turning red
c)
Phenolphthalein turning clear
d)
Bromothymol blue turning blue
70.
If the same solution causes red litmus paper to stay red and blue litmus paper to stay blue it is...
a)
Acidic 
b)
Basic
c)
Neutral
d)
Acidic & Basic
71.
Which of the following is the result of a basic solution?
a)
Litmus Paper turning red
b)
Universal indicator turning red
c)
Phenolphthalein turning clear
d)
Bromothymol Blue turning blue
72.
Which of the following is the result of a basic solution?
a)
Litmus Paper turning red
b)
Universal indicator turning red
c)
Phenolphthalein turning purple
d)
Bromothymol Blue turning yellow
73.
Which of the following is the result of a basic solution?
a)
Litmus Paper turning red
b)
Universal indicator turning blue
c)
Phenolphthalein turning clear
d)
Bromothymol Blue turning yellow
74.
Which of the following is the result of a basic solution?
a)
Litmus Paper turning blue
b)
Universal indicator turning red
c)
Phenolphthalein turning clear
d)
Bromothymol Blue turning yellow
75.
Which of the following is the result of a acidic solution?
a)
Litmus Paper turning red
b)
Universal indicator turning blue
c)
Phenolphthalein turning purple
d)
Bromothymol Blue turning blue
76.
Which of the following is the result of a acidic solution?
a)
Litmus Paper turning blue
b)
Universal indicator turning red
c)
Phenolphthalein turning purple
d)
Bromothymol Blue turning blue
77.
Which of the following is the result of a acidic solution?
a)
Litmus Paper turning blue
b)
Universal indicator turning blue
c)
Phenolphthalein turning clear
d)
Bromothymol Blue turning blue
78.
Which of the following is the result of a acidic solution?
a)
Litmus Paper turning blue
b)
Universal indicator turning blue
c)
Phenolphthalein turning purple
d)
Bromothymol Blue turning yellow
79.
If your car battery is leaking acid what would you do to neutralize the acid? Why?
a)
Add Baking Soda because it is an acid as well
b)
Add Baking soda because it is a base
c)
Add Sprite because it is  basic
d)
Add Lemon Juice because it is a acid
80.
Acids react with metals to produce?
a)
More acid 
b)
Hydrogen gas
c)
A base
d)
CO2 gass
81.

How does acid tastes

a)

Sweet

b)

Bitter

c)

Salty

d)

Sour

82.

Which acid is present in orange

a)

Tartaric acid

b)

Malic acid

c)

Citric acid

d)

Acitic acid

83.

Which acid is present in your stomach

a)

Naoh

b)

Sulpher

c)

Hcl

d)

Salt

84.

How does base tastes

a)

Sour

b)

Salty

c)

Bitter

d)

Sweet

85.

If the soil is acidic what we should do to make it neutral

a)

Add salt

b)

Add acid

c)

Add base

d)

Add sugar

86.

Which is a natural indicator

a)

Phenoptyalin

b)

Sulpher

c)

Litmus

d)

Naoh

87.

When acid is added to blue litmus paper the colour is

a)

Red

b)

Blue

c)

Green

d)

Yellow

88.

If the ph value is 5 what is the substance

a)

Acid

b)

Base

c)

Neutral

d)

Sweet

89.

Acids present in plants and animals are called ______.

a)

Mineral Acids

b)

Organic Acids

c)

Dilute Acids

90.

Acids Which are commonly used in laboratories are called _______.

a)

Minaral Acids

b)

Natural Acids

c)

Organic Acids

d)

Man-Made Acids

91.

When acid is added in litmus paper it turns _____.

a)

Yellow

b)

Red

c)

Blue

d)

Green

92.

When a Base is added to litmus paper it turns _____.

a)

Blue

b)

Red

c)

Green

d)

Orange

93.

Substance that is neither acidic nor basic it is said to be _______.

a)

acidic

b)

Basic

c)

Neutral

94.

When more water is added to an acid it is _____.

a)

Diluted

b)

Concentrated

c)

Normal

95.

Is this a neutralization reaction?

NaOH + HCL →\rightarrow  NaCl + H2O

a)

YES

b)

NO

96.

Litmus is obtained from _____

a)

lichens

b)

purple color

c)

red color

d)

blue color

97.

Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively are:

a)

pink and colourless

b)

blue and red

c)

red and blue

d)

colourless and pink

98.

Name the acid present in our stomach.

a)

Sulphuric acid

b)

Hydrochloric acid

c)

Nitric acid

d)

Carbonic acid

99.

Products of a neutralization reaction are always:

a)

an acid and a base

b)

an acid and a salt

c)

a salt and water

d)

a salt and a base

100.

Milk of magnesia is used as an

a)

Chocolate

b)

Soup

c)

antacid

d)

None of them

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