Why does rain water normally have a pH of about 5.6? When does it become acid rain?
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when it becomes more than 7 ph
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Hi !
pH or pure rain water is 7( neutral)
.When the rain water comes in contact with the CO₂ gas, present in the air , it leads to the formation of Carbonic acid( which is a weak acid) . The presence of this acid makes rain water slightly acidic.
When pH of rain water becomes less than 7 or equal to 5.6 , the rain water becomes acidic.
pH or pure rain water is 7( neutral)
.When the rain water comes in contact with the CO₂ gas, present in the air , it leads to the formation of Carbonic acid( which is a weak acid) . The presence of this acid makes rain water slightly acidic.
When pH of rain water becomes less than 7 or equal to 5.6 , the rain water becomes acidic.
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