Name the acids present in acid rain and state their sources in rainwater.

(N/A) The acids present in acid rain are $H_{2}CO_{3}$,$HNO_{3}$,and $H_{2}SO_{4}$.
$H_{2}CO_{3}$ is formed when atmospheric $CO_{2}$ dissolves in the presence of water vapor:
$CO_{2} + H_{2}O \rightarrow H_{2}CO_{3}$
$HNO_{3}$ is formed from nitrogen oxides. Natural sources of $NO$ include forest fires and lightning. Anthropogenic sources include combustion in aircraft,vehicle engines,furnaces,and power plants. $NO$ reacts with air to form $NO_{2}$,which dissolves in water to form $HNO_{3}$:
$3NO_{2} + H_{2}O \rightleftharpoons 2HNO_{3} + NO$
$H_{2}SO_{4}$ is formed from sulfur oxides. Sulfur oxides are produced by the combustion of fossil fuels and the extraction of metals from sulfide ores. $SO_{2}$ reacts with oxygen and water to form $H_{2}SO_{4}$:
$2SO_{2} + O_{2} + 2H_{2}O \rightarrow 2H_{2}SO_{4}$