Acid and alkaline2

Question 1

Why rain water slightly acidic

Answer 1

5.6, because carbon dioxide mixes with rainwater to form carbonic acid.

Question 2

Acid rain formation

Answer 2

Sulphur dioxide and nitrogen oxides are acidic gases.
When released into atmosphere,
they dissolve in water droplets to form sulphuric acid and nitric acid respectively.
Acidic droplets join to form clouds, fall acid rain.

Question 3

Why global issue acidic rain?

Answer 3

Acidic gases spread by wind over long distances

Question 4

Acid affect us buildings

Answer 4

Corrode metal objects (fence, bridge)
Corrode building and statues made of marble or limestone

Question 5

Acid damage plant (3)

Answer 5

Destroy leaves of plants directly, no photosynthesis
Dissolves and washes away soil nutrients, without enough nutrients, they grow slowly
Increase acidity of soil – can’t grow well

Question 6

Acid damage aquatic life (2)

Answer 6

Increase acidity of water – life can’t survive
Dissolves mineral in soil –> carry to bodies of water –> harmful mineral –> slow growht and reproduction

Question 7

Why in well ventilated area

Answer 7

Vapour irritate and corrode our respiratory tract, skin and eyes

Question 8

Never mix cleaners?

Answer 8

They produce toxic gas

Question 9

Always add acid/alkali TO water

Answer 9

Large amount of heat released, cause violent boiling and splashing