[DOC] [TLE] Acid Rain [PAR] Pure water has a pH of 7.0 (neutral); however, natural, unpolluted rainwater ... of 
carbonic acid shown in Equation 2, again lowering the pH of the solution. ... 
Unfortunately, human industrial activity produces additional acid-forming 
compounds in far ... Sulfur dioxide, like the oxides of carbon and nitrogen, reacts 
with water to... [DOC] [TLE] 22. Chapter 21, Acid Precipitation and Deposition.pdf [PAR] Identify three natural sources that produce acid-iorming compounds. ... Identify 
the two main anthropogenic sources oi sulfur dioxide and nitrogen oxides ... 
Figure 211 The pH scale and the acidity or alkalinity of some common ... He 
theorized that factory smoke and fumes could mix with precipitation and lower its 
acidity. [DOC] [TLE] pH of Water - Environmental Measurement Systems [PAR] If the pH of water is too high or too low, aquatic organisms living within it will die. 
... Due to the hydroxide ions they produce (which increase pH), all alkalis are 
bases. .... A pH level of 5.65, though acidic, is not considered acid rain. ... of water 
with nitrogen oxides, sulfur oxides and other acidic compounds, lowering its 
already... [DOC] [TLE] What is Acid Rain? | Acid Rain | US EPA [PAR] Mar 31, 2016 ... Acid rain results when sulfur dioxide (SO2) and nitrogen oxides (NOX) are ... 
These then mix with water and other materials before falling to the ground. ... 
Acidity and alkalinity are measured using a pH scale for which 7.0 is neutral. The 
lower a substance's pH (less than 7), the more acidic it is; the higher a... [DOC] [TLE] Causes, Effects and Solutions of Acid Rain - Conserve Energy Future [PAR] Causes, effects and solutions of acid rain: Acid rain refers to a mixture of ... When 
the pH level of rain water falls below this range, it becomes acid rain. ... The 
activities include air pollution sources emitting sulfur and nitrogen gases like ... 
with water, oxygen, and other chemicals to form various acidic compounds such 
as... [DOC] [TLE] Acid rain - Wikipedia [PAR] Acid rain is a rain or any other form of precipitation that is unusually acidic, 
meaning that it possesses 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 .... The principal cause 
of acid rain is sulfur and nitrogen compounds from... [DOC] [TLE] acid rain facts, information, pictures | Encyclopedia.com articles ... [PAR] Other chemicals contributing to acid rain include volatile organic compounds (
VOCs). ... eight); values lower than seven are considered acidic (the pH of lemon 
juice is two). ... Scientists generally speculate that one-third of the sulfur and 
nitrogen ... Even though pH levels vary considerably from one body of water to 
another,... [DOC] [TLE] Effects of acids and alkalis on aquatic life - Lenntech [PAR] Unpolluted deposition (or rain), in balance with atmospheric carbon dioxide, has 
a pH of 5.6. Almost everywhere in the world the pH of rain is lower than this. ... 
largest quantities of sulfur and nitrogen oxides and other acidic compounds. 
These compounds mix with water vapor at unusual proportions to cause acid 
deposition... [DOC] [TLE] Fresh Water, Natural Composition of - seawater, river, sea ... [PAR] The higher the concentration of H + in the water, the lower its pH, and the greater 
... The hydrogen ion produced by the second reaction lowers the pH of rain-water
. ... made unnaturally acidic by human-caused emissions of nitrogen and sulfur 
oxides. ... The type of rocks in the watershed influence stream-water composition. [DOC] [TLE] ACID RAIN : CAUSES, EFFECTS, AND SOLUTIONS - Sites - Google [PAR] Explanation of the causes, the consequences, and the solutions of acid rain. ... 
Oxides of nitrogen is a term used to describe any compound of nitrogen with any 
amount ... A pH scale is used to determine if a specific solution is acidic or basic.

Question: Sulfur & nitrogen compounds mix with water, lowering the pH level, & produce this kind of precipitation
Answer: acid rain