Is all rain acidic rain?

Answer:
No! Normal rain is just a part of the water cycle and has a pH level of 7. Acidic rain a.k.a. Acid rain is any form of precipitation that has chemicals absorbed in it and it has a pH level of either 6.9 or below.

^This is incorrect, Pure water has a pH of 7.0. However, normal rain is slightly acidic because carbon dioxide (CO2) dissolves into it forming weak carbonic acid, giving the resulting mixture a pH of approximately 5.6 at typical atmospheric concentrations of CO2. As of 2000, the most acidic rain falling in the U.S. has a pH of about 4.3.
First answer by ID1222249732. Last edit by Arjar. Contributor trust: 5 [recommend contributor recommended]. Question popularity: 2 [recommend question].