Acids And Alkali

Question 1

Name 2 examples of an acid

Answer 1

Hydrochloric acid and nitric acid

Question 2

Name 2 examples of an alkali

Answer 2

Toothpaste and soap

Question 3

What is neutralisation?

Answer 3

Where you add an acid to a base to make salt and water.

Question 4

Give an example of an equation of neutralisation.

Answer 4

Hydrochloric acid + barium - barium chloride
Sulphuric acid + lithium - lithium sulphate
Nitric acid + sodium - sodium nitrate

Question 5

What happens to the PH of an acid / alkali when it is neutralised?

Answer 5

The PH goes to 7

Question 6

What is a concentrate?

Answer 6

Large amount of acid in comparison to water

Question 7

What is a dilute?

Answer 7

A large amount of water in comparison to acid

Question 8

What is the salt to this equation?
Hydrochloric acid + lithium

Answer 8

Lithium chloride

Question 9

What is the salt to this equation?
Nitric acid + sodium

Answer 9

Sodium nitrate

Question 10

What ions are present in an acid?

Answer 10

Hydrogen ions

Question 11

What ions are present in an alkali?

Answer 11

Hydroxide ion

Question 12

What is a substance with a PH of less that 7?

Answer 12

An acid

Question 13

What is a substance with a PH of 7?

Answer 13

Neutral

Question 14

What is a substance with a PH of more that 7 ?

Answer 14

An alkali

Question 15

What colours are 1 - 3 on the PH scale?

Answer 15

Red

Question 16

What colour are 4 - 5 on the PH scale?

Answer 16

Orange

Question 17

What colour is 6 on the PH scale?

Answer 17

Yellow

Question 18

What colour is 7 - 10 on the PH scale?

Answer 18

Green

Question 19

What colour is 11 - 12 on the PH scale?

Answer 19

Blue

Question 20

What colour is 13 - 14 on the PH scale?

Answer 20

Purple

Question 21

What Is 1 - 3 on the PH scale?

Answer 21

A strong acid

Question 22

What is 4 - 6 on the PH scale?

Answer 22

A weak acid

Question 23

What is 7 on the PH scale?

Answer 23

Neutral

Question 24

What is 8 - 10 on the PH scale?

Answer 24

Weak alkali

Question 25

What is 11 - 14 on the PH scale?

Answer 25

Strong alkali

Question 26

What are the 2 rules for naming salts?

Answer 26

1) The first part comes from the base (e.g lithium) 2) The second part comes from the acid (e.g nitric acid)

Question 27

What salt is formed from Hydrochloric acid?

Answer 27

Chlorine

Question 28

What salt forms from nitric acid ?

Answer 28

Nitrate

Question 29

What salt forms from sulphuric acid ?

Answer 29

Sulfate

Question 30

Acid + metal =

Answer 30

Salt + hydrogen

Question 31

Acid + metal oxide =

Answer 31

Salt + water + carbon dioxide

Question 32

Acid + alkali =

Answer 32

Salt + water