Acids And Alkalis

Question 1

Name some hazards associated with acids and alkalis

Answer 1

Irritant
Corrosive
Toxic
Flammable

Question 2

What does corrosive mean

Answer 2

Corrosive materials can cause damage to metal, living tissue or any other things in a chemical reacion

Question 3

What safety precautions should you follow during practicals

Answer 3

Remove trip hazards
Wear safety goggles
No running
Hair tied up

Question 4

Name 3 acidic substances

Answer 4

Orange
Hydrochloric acid
Vinegar
Lemon juice

Question 5

Name 3 alkaline substances

Answer 5

Baking soda
Sodium hydroxide
Ammonia
Bleach
Washing liquid

Question 6

The pH scale ranges from __ to __

Answer 6

0-14

Question 7

___ to ___ are acidic.

Answer 7

0-6

Question 8

What number on the pH scale is neutral

Answer 8

7

Question 9

Finish the sentence
___ or above is alkaline

Answer 9

8

Question 10

What numbers on the pH scale are WEAK acids

Answer 10

4-6

Question 11

What number on the pH scale are strong acids

Answer 11

0-3

Question 12

What number on the pH scale is WEAK alkalis

Answer 12

8-10

Question 13

What numbers on the pH scale is strong alkaline

Answer 13

11-14

Question 14

Name different types of indicators

Answer 14

Universal indicator
Litmus paper
Methyl orange

Question 15

Whats neutralisation

Answer 15

Where acid reacts with a alkali making salt and water

Question 16

Give examples of useful neutralisation reactions

Answer 16

Treating insect sting with an alkaline substance
Stomach acid neutralised by an antacid

Question 17

What is the word equation for neutralisation

Answer 17

Acid + alkaline > salt + water