Acid-base reactions

Question 1

Define acids

Answer 1

Taste sour
Feel rough
Corrosive
Bases lose their basic character
Turns blue litmus ref

Question 2

Define bases

Answer 2

Bitter
Slippery
Corrosive
Acids lose acidic character
Turn red litmus blue

Question 3

Name acids

Answer 3

Orange juice, vinegar, lemon juice, citric acid, gastric acid

Question 4

Name bases

Answer 4

But carbonate of soda
Soap
Bleach
Ammonia solution

Question 5

Ammonia solution

Answer 5

NH3

Question 6

Name neutral

Answer 6

Water
table salt solution
cooking oil

Question 7

What is the unit to measure acidity

Answer 7

pH

Question 8

pH levels of acid

Answer 8

below 7

Question 9

pH levels of bases

Answer 9

Above 7

Question 10

pH levels of neutral

Answer 10

7

Question 11

What does acid-base indicators indicate?

Answer 11

If a substance is acidic or badic

Question 12

How is red cabbage water made?

Answer 12

Boiling red cabbage leaves in water - leaves removed. water dark purple

Question 13

Define water soluble pigment

Answer 13

Anthocyanin

Question 14

What can an universal indicator be used as?

Answer 14

Solution of paper

Question 15

What does each colours of a universal indicator correspond with?

Answer 15

pH value

Question 16

What are pH meters?

Answer 16

Digital pH meters - measure pH of substance quickly and accurate

Question 17

Vinegar

Answer 17

Acid - 2

Question 18

Lemon juice

Answer 18

Acid
3

Question 19

Orange juice

Answer 19

Avid - 3

Question 20

Yoghurt

Answer 20

Acid 6

Question 21

Bicarbonate of soda

Answer 21

8 base

Question 22

Toothpaste

Answer 22

9 base

Question 23

Saliva

Answer 23

6 acid

Question 24

Detergent

Answer 24

10 bade

Question 25

Bleach

Answer 25

13 base

Question 26

Window cleaner

Answer 26

11 base

Question 27

Milk

Answer 27

6 acid

Question 28

Water

Answer 28

7 neutral

Question 29

Hand soap

Answer 29

9 base

Question 30

Hydrochloric acid

Answer 30

HCl

Question 31

Sulphuric acid

Answer 31

H2SO4

Question 32

Nitric acid

Answer 32

HNO3

Question 33

Phosphoric acid

Answer 33

H3PO4

Question 34

Sodium hydroxide

Answer 34

NaOH

Question 35

Potassium hydroxide

Answer 35

KOH

Question 36

Calcium Hydroxide

Answer 36

Ca(OH)2

Question 37

Ammonia

Answer 37

NH3

Question 38

What must you do when diluting acids?

Answer 38

Add small amounts of acid - large distilled water

Question 39

Define neutralisation reaction

Answer 39

One in which an acid and a base react to produce a salt and water

Question 40

When does salt form?

Answer 40

Hydrogen kf acid is replaced by metal ion

Question 41

What do metal oxides form?

Answer 41

Basic solutions dissolved in water

Question 42

What does metal hydroxides from when dissolved in water?

Answer 42

Basic solutions

Question 43

What are metal carbonates?

Answer 43

Basic

Question 44

Why are metal carbonated usually solid?

Answer 44

Not so lionel in wayerb

Question 45

What is the reaction between an acid and metal carbonate?

Answer 45

Metal carbonate + acid -> salt + water + carbon dioxide

Question 46

What happens when an abuse reacts with a metal?

Answer 46

Products form d are salt and hydrogen

Question 47

Define hydrogen gas

Answer 47

• No colour to smell
• Reacts violently with oxygen to produce water
• gas less confidence than air

Question 48

Why is hydrogen gas easier to collect?

Answer 48

Can be compressed, high kinetic energy, particles further alsrt