How is Acid Rain Formed

How is Acid Rain Formed

How is Acid Rain Formed

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Formation of acid rain:

1. Sulphur dioxide accounts for most of the acid rain problems.
   1. (a) When sulphur dioxide dissolves in water, sulphurous acid is formed.
   2. SO₂(g) + H₂O(l) → H₂SO₃(aq)
   3. (b) Sulphur dioxide can react with oxygen and water to form sulphuric acid.
   4. 2SO₂(g) + O₂(g) + 2H₂O(I) → 2H₂SO₄(aq)
2. Acid rain occurs when the pH of rain water falls between 2.0 to 5.5. This is due to the presence of sulphurous acid, sulphuric acid and nitric acid in rain water.

how is acid rain formed

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how acid rain formed