Acids And Alkalis

Question 1

What is the meaning of corrosive? Give an example

Answer 1

Capable of destroying other substances as they cause a chemical reaction e.g. hydrochloric acid

Question 2

Give 3 safety measures when handling acids and alkalis.

Answer 2

1. Wear safety goggles
2. Always stand when handling substances
3. Clear work desk of any unneeded materials

Question 3

Give 3 examples of acids

Answer 3

Hydrochloric acid
Ethanoic acid
Nitric acid
Sulfuric acid
Apple juice
Mouth wash

Question 4

Give 3 examples of alkalis

Answer 4

Sodium hydroxide
Ammonia
Copper hydroxide
Potassium hydroxide
Bleach

Question 5

Which number on the pH universal scale is neutral?

Answer 5

7

Question 6

Which numbers on the pH universal scale are acids?

Answer 6

0-6

Question 7

Which numbers on the pH scale are alkalis?

Answer 7

8-14

Question 8

Which numbers on the pH universal scale are strong acids?

Answer 8

0-2

Question 9

Which numbers on the pH universal scale are weak acids?

Answer 9

3-6

Question 10

Which numbers on the pH universal scale are weak alkalis?

Answer 10

8-11

Question 11

Which numbers on the pH universal scale are strong alkalis?

Answer 11

12-14

Question 12

Give 5 examples of indicators

Answer 12

Red litmus paper
Blue litmus paper
Universal indicator
Phenolphthalein
Methyl orange

Question 13

What is a neutralisation reaction?

Answer 13

A chemical reaction in which an acid reacts with an alkali to form a type of salt and water.