Rain is naturally acidic due to the dissolution of carbon dioxide forming weak carbonic acid acid rain the other major acidic oxide that contributes to the formation of acid rain is nitrogen dioxide nitric oxide is similarly, nitrogen dioxide reacts with water to form a mixture of nitric acid and nitrous acid. Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it has elevated levels of hydrogen ions (low ph) it can have harmful effects on plants, aquatic animals and infrastructure acid rain is caused by emissions of sulfur dioxide and nitrogen oxide, which react with the water molecules in the.
Nitric oxide (no), which also contributes to the natural acidity of rainwater, is formed during lightning storms by the reaction of nitrogen and oxygen, two common atmospheric gases (equation 3) in air, no is oxidized to nitrogen dioxide (no2) (equation 4), which in turn reacts with water to give nitric acid ( hno3) (equation 5).
Relevant about nitrogen dioxide they function as catalysts in photochemical reaction cycles that either produce or destroy ozone, 03, and they are precursors of nitric acid, hno3, which is an important constitu- ent of acid precipitation ( bollinger et al, 1983) direct impacts of these compounds are human health im- pairment.
This image illustrates the pathway for acid rain in our environment acid rain results when sulfur dioxide (so2) and nitrogen oxides (nox) are emitted into the atmosphere and transported by wind and air currents the so2 and nox react with water, oxygen and other chemicals to form sulfuric and nitric.