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Acids and Bases

Total questions: 43

Worksheet time: 22mins

Name
Class
Date
1.

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)

is an acid

c)

have neutral pH

d)

doesn't have pH

2.

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)

7

c)

9

d)

5

3.
Which of the following is a base?
a)
orange juice
b)
water
c)
vinegar
d)
dishwashing detergent
4.
What would be considered the weakest base? 
a)
8
b)
14
c)
7.8
d)
11.6
5.
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
6.
Turns litmus red
a)
Acids
b)
Bases
c)
All
7.

What pH is the strongest base?

a)

1

b)

7

c)

4

d)

14

8.
Tastes Sour
a)
Acids
b)
Bases
c)
Salts
d)
All
9.

Complete the word equation below:

Acid + base --> ............... + water

a)

water

b)

salt

c)

gold

d)

metal

10.

.............................. + sodium hydroxide --> sodium chloride + water

a)

Nitric acid

b)

Sulphuric acid

c)

Hydrochloric acid

d)

Ethanoic acid

11.

Why is toothpaste alkaline?

a)

It can neutralise strong alkaline in

your mouth

b)

It can neutralise acid in

your mouth

c)

It can refresh your teeth

d)

Toothpaste is not alkaline.

12.

What colour is Universal indicator when the solution is neutral?

a)

Red

b)

Green

c)

Blue

d)

Purple

13.

What type of reaction occurs when you react an acid with an alkali?

a)

combustion

b)

decomposition

c)

no reaction

d)

neutralisation

14.

Lithium hydroxide + nitric acid ->

a)

Lithium nitrate + hydrogen

b)

Lithium nitride + salt

c)

Lithium nitrate + water

d)

Lithium nitrate + hydroxide

15.

ph range of acids are .....

a)

0-6

b)

7

c)

8-14

d)

4-10

16.

ph range of alkalis are .....

a)

0-6

b)

7

c)

8-14

d)

4-10

17.

What colour change would you see if you added nitric acid to sodium hydroxide and universal indicator?

a)

red -> blue

b)

purple -> green

c)

red -> yellow

d)

pink -> colourless

18.

iron chloride, sodium nitrate, lithium sulphate, copper carbonate are all examples of .........

a)

acids

b)

alkalis

c)

salts

d)

mixtures

19.

Which of the following solutions is suitable to be used to indicate neutralisation between acid and alkali?

a)

Iodine solution

b)

Sodium hydroxide solution

c)

Colour paper

d)

Universal indicator

20.

Metal oxide + acid -->

a)

salt + water

b)

salt + oxygen

c)

salt + hydrogen

d)

salt + water + carbon dioxide

21.

metal + acid -->

a)

salt + hydrogen

b)

salt + water

c)

salt + carbon dioxide

22.

Metal carbonate + acid -->

a)

salt + water

b)

salt + oxygen

c)

salt + hydrogen

d)

salt + water + carbon dioxide

23.
Complete the following reaction:
Sulphuric acid + sodium carbonate
--> 
a)
Carbon dioxide + water 
b)
calcium carbonate + water + carbon dioxide 
c)
Sodium sulphate + water + carbon dioxide 
d)
Sodium chloride + water + carbon dioxide 
24.

Complete the following reaction:

Sulphuric acid + magnesium oxide -->

a)

Magnesium sulphate + water

b)

Magnesium + water

c)

Magnesium sulphate + hydrogen

d)

Magnesium sulphate + water + carbon dioxide

25.

Complete the following reaction:

Nitric acid + sodium -->

a)

Sodium nitrate + water

b)

Sodium + Water

c)

Sodium nitrate + hydrogen

d)

Sodium nitrate + water + carbon dioxide

26.

Copper oxide is

a)

White

b)

Blue

c)

Green

d)

Black

27.

The correct order for the processes used to make copper sulphate was

a)

crystallise/filter/evaporate/neutralise

b)

neutralise/evaporate/crystallise/filter

c)

filter/crystallise/neutralise/evaporate

d)

neutralise/filter/evaporate/crystallise

28.

What colour does the solution turn when sulfuric acid is added to copper carbonate?

a)

Blue

b)

Green

c)

Clear

d)

Purple

29.

How do you remove the water to leave solid copper sulfate crystals?

a)

Filter

b)

Evaporate

c)

Distill

30.

What is the symbol for Copper?

a)

C

b)

co

c)

Cu

d)

CU

31.
Identify the equipment shown here:
a)
crucible
b)
evaporating dish
c)
mortar and pestle
d)
bowl
32.

Which laboratory apparatus is a beaker?

a)
b)
c)
d)
33.
Name this lab apparatus:
a)
forceps
b)
filter funnel
c)
mortar and pestle
d)
clay triangle
34.

Which of the following statements best define the term ‘salt’?

a)

Salt is formed when metal reacts with an alkali.

b)

Salt contains sodium ions and chloride ions.

c)

Salt is formed from a weak Van der Waals’ forces of attraction.

d)

Salt is formed when the hydrogen ions in an acid is replaced by metal or ammonium ions.

35.

Why do you add excess of the insoluble reactant when making a soluble salt?

a)

To make sure all the acid is neutralised

b)

To separate the solid from the solution

c)

To make sure a reaction occurs

d)

To have the reaction happen faster

36.
What is the hazard shown in this hazard sign?
a)
Explosive
b)
Corrosive
c)
Irritant
d)
High level Irritant
37.

What does this hazard symbol mean?

a)

cross

b)

harmful / irritant

c)

sharp

d)

chemical

38.
a)
Poison/Toxic
b)
Bio Hazard
c)
Radioactive
d)
Corrosive
39.

How many atoms are in H2SO4?

a)

3

b)

7

c)

6

d)

5

40.

Which element is in all acids?

a)

Hydrogen

b)

Oxygen

c)

Helium

d)

Chlorine

41.

Which pH of acid would a metal react most vigorously with?

a)

1

b)

3

c)

5

d)

7

42.

If the pH of a solution changes from 1 to 3, what has happened to it's acidity?

a)

increased

b)

decreased

c)

neutralised

d)

Stayed constant

43.

What colour does red litmus turn in a neutral solution of pH 7?

a)

No change, stays red

b)

Turns blue

c)

Turns green

d)

Bleaches the paper

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