Acids And Alkalis

Question 1

What are acids?

Answer 1

Substances that dissolve in water and form a solution with a PH less than 7

Question 2

What are alkalis?

Answer 2

Substances that dissolve in water and form a solution with a PH greater than 7

Question 3

What is the difference between concentrated and diluted?

Answer 3

Concentrated means mostly solute
Diluted means mostly solvent

Question 4

What is Hydrochloric acid used for?

Answer 4

Digests food in the human stomach

Question 5

What is Sulfuric acid used for?

Answer 5

Car batteries

Question 6

What is Nitric acid used for?

Answer 6

Fertilisers

Question 7

What is Ethanoic acid used for?

Answer 7

Vinegar

Question 8

What is citric acid used for?

Answer 8

Citrus fruits

Question 9

What is carbonic acid used for?

Answer 9

Fizzy drinks

Question 10

What is sodium hydroxide used for?

Answer 10

Oven/drain cleaners

Question 11

What is calcium hydroxide used for?

Answer 11

Treatment for acidic soil

Question 12

What is magnesium hydroxide used for?

Answer 12

Indigestion remedies

Question 13

What is ammonia used for?

Answer 13

Silver/brass cleaners

Question 14

What is an indicator?

Answer 14

A substance that is one colour in acidic solutions and another in alkaline solutions

Question 15

What colour does the red cabbage indicator turn acids?

Answer 15

Red

Question 16

What colour does the red cabbage indicator turn alkalis?

Answer 16

Green

Question 17

What colour is litmus normally?

Answer 17

Purple

Question 18

What colour is litmus in acid?

Answer 18

Red

Question 19

What colour is litmus in an alkali?

Answer 19

Blue

Question 20

What colour is phenolphthalein normally?

Answer 20

Colourless

Question 21

What colour is phenolphthalein in acid?

Answer 21

Colourless

Question 22

What colour is phenolphthalein in alkali?

Answer 22

Pink

Question 23

What colour is methyl orange normally?

Answer 23

Orange

Question 24

What colour is methyl orange in acid?

Answer 24

Red

Question 25

What colour is methyl orange in an alkali?

Answer 25

Orange

Question 26

What colour is bromothymol blue normally?

Answer 26

Orange

Question 27

What colour is bromothymol blue in acid?

Answer 27

Yellow

Question 28

What colour is bromothymol blue in alkali?

Answer 28

Blue

Question 29

What is the difference between universal indicator and other indicators?

Answer 29

It shows the acidic/alkaline strength of the solution

Question 30

What is the colour and number of a strong acid with universal indicator?

Answer 30

Red/orange
0 - 3

Question 31

What is the colour and number of a weak acid?

Answer 31

Yellow/orange
4-6

Question 32

What is the colour and number of a neutral solution?

Answer 32

Green
7

Question 33

What is the colour and number of a weak alkali?

Answer 33

Blue-green/blue
8 - 10

Question 34

What is the colour and number of a strong alkali?

Answer 34

Purple/blue
11 - 14

Question 35

Is a PH meter or universal indicator more accurate?

Answer 35

PH meter

Question 36

What is the difference between a base and an alkali?

Answer 36

An alkali is a soluble base
Bases are any metal oxides/hydroxides

Question 37

What is a neutralisation reaction and what is a common example of what is formed?

Answer 37

When a solution reaches a PH of 7
Can make salt