6.3 + 6.4 Acid Reactions

Question 1

Name a commonly used strong acid

Answer 1

Hydrochloric acid

Question 2

What products are formed when you react a metal with an acid?

Answer 2

Salt + hydrogen

Question 3

Worded equation for different metal + dilute acids. Give an example using the metal zinc and nitric acid.

Answer 3

metal + dilute acid → salt + hydrogen.
Zinc + nitric acid → zinc nitrate + hydrogen

Question 4

What is a neutralisation reaction?

Answer 4

It is a reaction where an acid and a base react together to form water (pH of 7: neutral)

Question 5

What products are formed when there is a neutralisation reaction?

Answer 5

salt + water

Question 6

Worded equation for different bases + acids. Give an example using hydrochloric acid and the base sodium hydroxide.

Answer 6

Acid + base → salt + water.
Hydrochloric acid + sodium hydroxide → sodium chloride + water

Question 7

What is ocean acidification?

Answer 7

Ocean acidification is when the amount of carbon dioxide increases because the ocean absorbs it. A chemical reaction occurs causing the water to become more acidic.

Question 8

What are some harmful effects of ocean acidification?

Answer 8

• it reduces the amount of carbonate in the water.
• makes it difficult for organisms to form shells
• existing shells can dissolve because of the acid

Question 9

What is acid rain

Answer 9

Large amounts of waste gases from industry and motor vehicles are making rain more acidic than normal.

Question 10

Why is normal rain slightly acidic

Answer 10

Rain is normally slightly acidic because carbon dioxide in the air dissolves in raindrops to form carbonic acid

Question 11

What are some harmful effects of acid rain?

Answer 11

• trees can get killed
• effects lakes, rivers, etc and kill life in there