Why does the rain water normally have a pH of about 5.6? When does it become acid rain?
Raghav , 11 Years ago
Grade 12
Physical Chemistry> Why does the rain water normally have a p...
2 Answers
Suraj Prasad
Last Activity: 10 Years ago
Pure water has a pH of 7.0 (neutral); however, natural, unpolluted rainwater actually has a pH of about 5.6 (acidic).[Recall that pH is a measure of the hydrogen ion (H+) concentration.] The acidity of rainwater comes from the natural presence of three substances (CO2, NO, and SO2) found in the troposphere (the lowest layer of the atmosphere).
Karan Dholakia
Last Activity: 7 Years ago
) found in the troposphere (the lowest layer of the atmosphere).2NO, and SO2,Pure water has a pH of 7.0 (neutral); however, natural, unpolluted rainwater actually has a pH of about 5.6 (acidic).[Recall that pH is a measure of the hydrogen ion (H+) concentration.] The acidity of rainwater comes from the natural presence of three substances (CO
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