” The lower a substance’s pH, the more acidic it is. Pure water has a pH of 7.0. However, normal rain is slightly acidic because carbon dioxide (COdos) 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.
Aftereffects of Acid Rain
Acid rain causes acidification of lakes and streams and contributes to the damage of trees at high elevations (for example, red spruce trees above 2,000 feet) and many sensitive forest soils. In addition, acid amino rain accelerates the decay of building materials and paints, including irreplaceable buildings, statues, and sculptures that are part of our nation’s cultural heritage. Prior to falling to the earth, sulfur dioxide (SO2) and nitrogen oxide (NOx) gases and their particulate matter derivatives-sulfates and nitrates-contribute to visibility degradation and harm public health.
The latest ecological results of acid precipitation is actually very obviously seen in the fresh new aquatic, or liquid, environment, such as for instance streams, lakes, and you will s has actually an excellent pH anywhere between six and you can 8, however some lakes are naturally acidic actually without the aftereffects of acid precipitation. Acid precipitation mainly influences sensitive and painful authorities from drinking water, that are based in watersheds whose soils features a finite feature to help you neutralize acidic compounds (named “buffering capacity”).