8.3 Acid Deposition

Acid rain can release nitrates in the soil that wash into waterways and cause eutrophication.
Discuss the meaning of the term eutrophication and its impact on plant life.

[4]

Identify a metal whose toxic ions can be released into waterways from the effects of acid deposition.

[1]

Aluminium hydroxide can be dissolved out of rocks under acidic conditions and release aluminium ions into the environment. Formulate an ionic equation for the reaction.

[1]

Aluminium hydroxide is amphoteric and can react with alkalis to form aluminate salts. Formulate an equation for the reaction between aluminium hydroxide and sodium hydroxide.

[1]

Two of the four oxoacids found in acid deposition are sulfurous acid, H₂SO₃ and nitrous acid, HNO₂.

Write equations to show the formation of these oxoacids from sulfur and nitrogen.

[4]

State the name and formula of the conjugate base of sulfurous acid, H₂SO₃.

[2]

Suggest ways of decreasing the impact of sulfurous acid on the environment.

[2]