The carbon dioxide occurring naturally in the air dissolves in precipitation, making it slightly acidic with a pH between ____.
A)3.0 and 3.6
B)4.0 and 4.6
C)5.0 and 5.6
D)6.0 and 6.6
E)7.0 and 7.6

Question

Quizplus · Accepted Answer

The natural acidity of rainwater comes from the dissolution of carbon dioxide in the atmosphere, forming a weak carbonic acid. This gives precipitation a pH typically between 5.0 and 5.6, making option C correct.

The Carbon Dioxide Occurring Naturally in the Air Dissolves in Precipitation