ABSynthesis
In a synthesis reaction, two or more substances combine to form a single product. Also known as a combination reaction, the compound formed by this reaction can by either ionic or molecular.
nitrogen
monoxide(g)N2(s)+ O2(g)
2NO(g)Application
As described in the combustion section, coal-burning
power plants and automobiles release gaseous oxides of nitrogen and sulfur
into the air. These react with the water vapour in the air, forming acids.
For example, the reactions can be: nitrogen dioxide(g)+
water(l)nitric
acid(aq)
NO2(g)+ H2O(l)H2NO3(aq)sulfur
trioxide(s)+ water(l)sulfuric
acid(aq)
SO3(g)+ H2O(l)H2SO4(aq)
Impact
The resultant acids increase the acidicity of precipitation, thus causing acid rain. Decades of human intervention have increased the environmental stress on high elevation forests and aquatic organisms in sensitive ecosystems. In extreme cases, acid rain has altered entire biological communities and eliminated some fish species from certain lakes and streams. In many other cases, the changes have been more subtle, leading to a reduction in the diversity of organisms in an ecosystem. Acid rain also can damage certain building materials and historical monuments.src