Free Printable Acids and Bases 1

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Worksheets

Acids and Bases 1

Total questions: 108

Worksheet time: 5hrs 24mins

Name

Class

Date

1.

Base change red litmus paper to blue.

a)

True

b)

False

2.

Character of acid is having sour taste.

a)

True

b)

False

3.

Acid change blue litmus paper to red.

a)

True

b)

False

4.

How do acids taste compared to bases?

a)

Acid is sweet and base is sour

b)

Acid is bitter and base is sour

c)

Acid is sour and base is bitter

5.

Which of the following is a base?

a)

Orange juice

b)

Water

c)

Vinegar

d)

Toothpaste

6.

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.

7.

Choose the correct answer. Acid or base?

a)

Acid

b)

Base

8.

Choose the correct answer. Acid or base?

a)

Acid

b)

Base

9.

Choose the correct answer. Acid or base?

a)

Acid

b)

Base

10.

Choose the correct answer. Acid or base?

a)

Acid

b)

Base

11.

Choose the correct answer. Acid or base?

a)

Acid

b)

Base

12.

Choose the correct answer. Acid or base?

a)

Acid

b)

Base

13.

WHAT ARE THE PROPERTIES OF ACID ?

a)

Acids are corrosive, sour,

b)

Lemon

c)

Mint

d)

tastes bitter

14.

What is the pH of Lemon

a)

3.5

b)

14

c)

2.0

d)

1.7

15.

Soap is a weak base. What is true about the taste of bases?

a)

they taste sour

b)

they taste sweet

c)

they taste bitter

d)

they taste salty

16.

Which of these solutions is an acid?

a)

Dish Soap: pH of 12

b)

Tomato Soup: pH of 4

c)

Baking Soda: pH of 9

d)

Drain Cleaner: pH of 14

17.

Which are the examples of bases

a)

Drain cleaner

b)

Battery Acid

c)

Lime water

d)

Milk

18.

How to neutralise wasp sting

a)

baking soda

b)

vinegar

c)

Lime water

d)

Drain cleaner

19.

From which point to which point in the pH scale is Base

a)

7.1- 14

b)

0- 6.9

c)

6.2- 9.1

d)

12- 14

20.

in which Acid base indicator is Acid is colourless base is pink

a)

Methyl orange

b)

Litmus paper

c)

Phenolphthalein

d)

Universal indicator

21.

Is this neutralised wasp sting and vinegar

a)

Yes

b)

No

22.

What can neutralise a strong base

a)

Neutral

b)

Weak base

c)

Base

d)

Hydrochloric acid (pH of 3.01)

23.

Differentiate between Base and alkaline

a)

Alkaline is corrosive and base is bitter

b)

Alkaline is blue in colour and base is red in colour

c)

Alkaline is soluble and base is insoluble

d)

alkaline is insoluble and base is soluble

24.

An acid is a solution that contains __________ ions dissolved in water.

a)

positive

b)

negative

25.

Which of the following substances contain acid?

a)

An orange

b)

Bleach

c)

Distilled water

d)

Washing powder

26.

Which of the following substances contain an alkali?

a)

Baking powder

b)

Coca cola

c)

Distilled water

d)

Vinegar

27.

Which of the following pH numbers indicates a neutral substance?

a)

1

b)

5

c)

7

d)

14

28.

Which of the following pH numbers indicates a strong acid?

a)

1

b)

5

c)

7

d)

14

29.

Which of the following pH numbers indicate a strong alkali?

a)

1

b)

5

c)

7

d)

14

30.

What is the pH of pure water?

a)

pH 7

b)

pH 3

c)

pH 12

d)

pH 8

31.

What two substance are formed when an acid and alkali react together in equal amounts?

a)

Salt and water

b)

Alkali and water

c)

Acid and water

d)

Acid and alkali

32.

What substance could you use to test if a substance is an acid or alkali?

a)

Indicator

b)

Salt

c)

Catalyst

d)

Water

33.

When found in food, acids are ________

a)

Sour

b)

Bitter

c)

Salty

d)

Slippery

34.

When dissolved in water, acids produce:

a)

bases

b)

salts

c)

hydrogen (H⁺) ions

d)

hydroxide (OH^-) ions

35.

A common alkali used in the lab is

a)

hydrochloric acid

b)

sodium chloride

c)

hydrogen sulphate

d)

sodium hydroxide

36.

The pH scale is a range from:

a)

1-7

b)

0-14

c)

1-14

d)

1-20

37.

Acid in vinegar:

a)

Hydrochloric acid

b)

Sulfuric acid

c)

Acetic acid

d)

Carbonic acid

38.

When dissolved in water, bases produce:

a)

bases

b)

salts

c)

hydrogen (H⁺) ions

d)

hydroxide (OH^-) ions

39.

Which of the following is not the properties of alkalis?

a)

Slipery

b)

Have a pH less than 7

c)

The pH scale of alkalis from 8 - 14

d)

Corrosive

40.

Which of the following is acid?

a)

b)

c)

41.

Which of the following is alkali?

a)

b)

c)

42.

Which of the following is neutral?

a)

b)

c)

43.

$Acid\ +\ Alkali\ \rightarrow\ ....\ +\ Water$

a)

Hydrogen

b)

Water

c)

Carbon dioxide

d)

Salt

44.

Reaction between acid and alkali producing salt and water:

a)

Combustion

b)

Neutralization

c)

Precipitation

d)

Decomposition

45.

If a substance has a pH of 10 it is considered

a)

Acidic

b)

Basic

c)

Neutral

46.

Acids produce _________ ions when they break down or dissocciate.

a)

Hydroxide (OH-)

b)

Water

c)

Chlorine (Cl-)

d)

Hydrogen (H+)

47.

Bases release ____________ ions when they break down or dissociate.

a)

Hydrogen (H+)

b)

Hydroxide (OH-)

c)

Chlorine (Cl-)

d)

no

48.

Water is neutral because the number of hydrogen and hydroxide ions is _________.

a)

the same

b)

different

49.

The pH scale ranges from ____________.

a)

0-7

b)

1-100

c)

1-20

d)

0-14

50.

A(n) ______ is a substance with a pH less than 7

a)

Acid

b)

Alkaline

c)

Base

d)

Buffer

51.

A(n) _______ is a substance with a pH greater than 7.

a)

Base

b)

Acid

c)

Buffer

d)

Water

52.

H₂C₂O₄

a)

carbonic acid

b)

chromic acid

c)

chloric acid

d)

oxalic acid

53.

H₂SO₃

a)

sulfuric acid

b)

hydrosulfuric acid

c)

sulfurous acid

d)

persulfuric acid

54.

chlorous acid

a)

HClO₃

b)

HClO₂

c)

HClO

d)

HCl

55.

HF

a)

flouric acid

b)

hydrofluoric acid

c)

fluorate acid

d)

hydrogen fluoridic acid

56.

HI

a)

iodic acid

b)

hydroiodic acid

c)

iodous acid

d)

hypoiodous acid

57.

hydrochloric acid

a)

HClO₃

b)

HClO₂

c)

HClO

d)

HCl

58.

nitrous acid

a)

H₂NO₃

b)

HNO₃

c)

HNO₂

d)

H₂NO₂

59.

Select the name for the following acid: H₃PO₄

a)

Phosphoric acid

b)

Phosphorous acid

c)

Hydrophosphoric acid

60.

Which pH value indicates the most basic solution?

a)

7

b)

8

c)

3

d)

11

61.

Which is the most likely pH for a solution of a weak acid?

a)

1

b)

5

c)

11

d)

14

62.

If a solution is acidic, it can be neutralized by adding

a)

a stronger acid

b)

heat

c)

a base

d)

a weaker acid

63.

When the pH of a solution becomes more basic, the number on the pH scale

a)

decreases

b)

increases

c)

stays the same

d)

triples

64.

What is the pH of a solution that results from the complete neutralization of an HCl solution with a KOH solution?

a)

1

b)

7

c)

10

d)

4

65.

Which solution reacts with LiOH to produce a salt and water?

a)

KCl

b)

CaO

c)

NaOH

d)

H2SO4

66.

When an acid and a base are mixed, what is the reaction called?

a)

Neutralization

b)

Hydrolyzed

c)

Hydro Ionization

d)

A salt and a water reaction

67.

What base has a pH of 8.5?

a)

Blood

b)

Soap

c)

Baking Soda

d)

Drain Cleaner

68.

Lemons would be classified as a

a)

Strong base

b)

Weak Base

c)

Strong Acid

d)

Weak Acid

69.

In a water solution, how do acids differ from bases?

a)

Acids form salts, but bases do not

b)

Acids turn litmus blue, while bases turn litmus red

c)

Acids form hydrogen ions (H+), while bases form hydroxide ions (OH-)

d)

Bases form salts, but acids do not

70.

Marti took a balloon and filled it with 14 grams of baking soda. She then put 40 mL of vinegar into an empty water bottle. Marti stretched the balloon onto the top of the bottle and recorded the mass. She then flipped the balloon up so the baking soda fell into the vinegar. She observed it bubbling and could hear it fizzing. Marti laughed as the balloon filled with the carbon dioxide that was given off. After the reaction stopped, on the bottom of the bottle, Marti notices a white and clear substance. She remembers that she had learned that when you mix an acid (Vinegar) and a base (baking soda), you create

a)

acid and metal

b)

acid and base

c)

base and water

d)

salt and water

71.

Which has a pH below 7?

a)

Acid

b)

Base

72.

Which has a bitter taste?

a)

Base

b)

Acid

c)

flagella

d)

cila

73.

Turns litmus red

a)

Acids

b)

Bases

c)

All

74.

What pH is the strongest base?

a)

1

b)

7

c)

4

d)

14

75.

What methods can you use to measure the pH of a solution?

a)

Observing color or clarity

b)

Measuring mass or volume

c)

Measuring density or electrical conductivity

d)

Using acid base-indicators or pH meters

76.

Which of the following is most likely to be basic:

a)

Lemon juice

b)

Vinegar

c)

Laundry detergent

d)

Coke

77.

Tastes Sour

a)

Acids

b)

Bases

c)

Salts

d)

All

78.

Why are bases useful as cleaning products?

a)

They dissolve fats and oils

b)

they are corrosive, so they eat anything

c)

they don't mix with water

d)

since bases are slippery, they slip dirt off of surfaces

79.

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

80.

Which of these pH values would indicate that a solution is a weak base?

a)

4

b)

5.6

c)

8

d)

13

81.

When dissolved in water, acids produce:

a)

bases

b)

salts

c)

hydrogen ions

d)

hydroxide ions

82.

Which type of ion does a base produce when it is dissolved in water?

a)

oxide

b)

oxygen

c)

hydrogen

d)

hydroxide

83.

A hydrogen ion, H⁺, is the same as a(n):

a)

neutron

b)

electron

c)

proton

d)

hydroxide ion

84.

A Bronsted Lowry acid:

a)

donates H+ to another substance

b)

accepts H+ from another substance

c)

produces H+

d)

produces OH-

85.

A Bronsted Lowry base:

a)

donates H+ to another substance

b)

accepts H+ from another substance

c)

produces H+

d)

produces OH-

86.

Which substance is an Arrhenius base

a)

KCl

b)

CH₃Cl

c)

KOH

d)

CH₃OH

87.

An Arrhenius base yields which ion as the only negative ion in an aqueous solution?

a)

hydride

b)

hydrogen

c)

hydronium

d)

hydroxide

88.

One of the signs of a chemical reaction taking place is:

a)

Bubbles are produced

b)

Reactants are not combining

c)

Products are not forming

d)

Color is not changing

89.

Which of the following is an acid?

a)

shampoo

b)

baking soda

c)

orange juice

d)

water

90.

Which of the following is a base?

a)

orange juice

b)

water

c)

vinegar

d)

dishwashing detergent

91.

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

92.

Ranging from 0 to 14, a pH value indicates how acidic or basic a solution is. Which of these pH values would be a strong acid?

a)

2

b)

6

c)

9

d)

13

93.

What is the pH of water?

a)

0

b)

4

c)

7

d)

14

94.

Litmus paper can tell you if a solution is acidic, neutral or basic by changing color when placed in a solution. If you test a base with litmus paper, it will turn ____________.

a)

purple

b)

red

c)

blue

d)

pink

95.

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.

96.

When using pH paper, the pH of a solution can be determined by looking at the _______ of the paper.

a)

texture

b)

color

c)

length

d)

mass

97.

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

98.

Bleach is a strong base, what is the pH level of bleach?

a)

13

b)

14

c)

1

d)

2

99.

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

100.

A hydrogen ion, H⁺, is the same as a(n):

a)

neutron

b)

electron

c)

proton

d)

hydroxide ion

101.

Which food is the most acidic?

a)

bananas

b)

lemon juice

c)

orange juice

102.

Pollution causes the pH of rain water fall below 6. What is such type of rain called?

a)

Acid rain

b)

polluted rain

c)

low pH rain

103.

Acid + base --> ?

a)

salt + hydrogen gas + water

b)

salt + carbon dioxide + water

c)

salt + water

d)

salt only

104.

What is a number line ranging from 0-14 that shows how acidic or basic something is?

a)

Neutralization Chart

b)

pH Scale

c)

Acid-Base Indicator

d)

Scantron Test

105.

Turns Universal Indicator and litmus paper blue.

a)

Acids

b)

Bases

c)

Salts

d)

All

106.

is this object acidic or base

a)

Acidic

b)

Base

c)

neither

d)

neutral

107.

What was red cabbage juice used as in the lab we performed?

a)

as an acid

b)

as a base

c)

as a colorant

d)

as an indicator

108.

What is the formula for hydrocyanic acid?

a)

HCNO

b)

HCN

c)

HClO₄

d)

HClO

100 %

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