Acid rain is known to contain some acids. Name these acids and where from they come in rain?

Answers (1)

The pH of rainwater is 5.6 because of the presence of H+ ions; they are formed by the reaction of CO2 present in the atmosphere with rainwater

H_{2}O(l) + CO_{2}(g) \rightarrow H_{2}CO_{3}(aq)

H_{2}CO_{3}(aq) \rightarrow H^{+}(aq) +HCO_{3}(aq)

Acid rain is the one where the pH of rainwater drops below 5.6. Its major contributors are SO_{2} and NO_{2} after reaction and oxidation with rainwater; polluted air contains particulate matter that catalyses the oxidation,

2SO_{2}(g) + O_{2}(g) + 2H_{2}O(l) \rightarrow 2H_{2}SO_{4}(aq)

4NO_{2}(g) + O_{2}(g) + 2H_{2}O(l) \rightarrow 4HNO_{3}^{-}(aq)

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