Chapter 28- Acids And Bases

Question 1

What are bases which dissolve into water called?

Answer 1

Alkalis

Question 2

What is the pH scale?

Answer 2

It gives us an indication of the level of acidity or basicity in a solution.

Question 3

What are the 2 most common laboratory acids?

Answer 3

• Hydrochloric acid (HCl)

- Sulfuric acid (H2SO4)

Question 4

What is e chemical formula for sodium hydroxide?

Answer 4

NaOH

Question 5

What is sodium hydroxide used for?

Answer 5

To clear blocked drains

Question 6

Wha is the formula for calcium hydroxide?

Answer 6

Ca(OH)2

Question 7

What is a solution of calcium hydroxide?

Answer 7

Limewater

Question 8

What is limewater used for?

Answer 8

To test for the presence of carbon dioxide in the air

Question 9

How is a neutralisation reaction represented?

Answer 9

Acid + base —-> salt + water

Question 10

What is a fuel?

Answer 10

Any substance that burns in oxygen to produce heat.

Question 11

What are the 3 main fossil fuels?

Answer 11

• Coal
• Oil
• Natural gas

Question 12

What is a fossil fuel?

Answer 12

Fossil fuels are fuels that were formed from the remains of plants and animals that lived millions of years ago.

Question 13

What are hydrocarbons?

Answer 13

Hydrocarbons are compounds consisting of hydrogen and carbon only.

Question 14

What do acids and bases affect?

Answer 14

The colour of indicators.