Acid rain forms when water vapor and certain elements chemically combine with natural and man-made pollutants-such as sulfur dioxide or nitrogen oxides-in the ...
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Why is rain water natural acidic?
Answer
Pure water has a pH of 7.0, this is neutral. Natural, unpolluted rainwater actually has a pH of about 5.6 which makes it acidic. The acidity of rainwater comes from the natural presence of CO2, NO, and SO2 in the lowest layer of the atmosphere (the troposphere).
Q&A Related to "Why is rain water natural acidic"
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Because some of the carbon dioxide which is present naturally in the air is dissolved in the water, forming the weak acid carbonic acid.
http://wiki.answers.com/Q/Why_is_rain_water_natura...
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The acidity or alkalinity of water is measured on a scale from zero to 14. The scale used is a measurement of potential hydrogen ions, known as pH. When the pH of a substance is above
http://www.ehow.com/about_6475032_rain-naturally-a...
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1. If you would like to purify rain water, you can follow the simple steps used for distilling water. Distilling water allows you to collect the water without the impurities that
http://www.ehow.com/how_4846878_purify-rain-water-...
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Carbonic acid forms when carbon dioxide in the atmosphere dissolves in water droplets. The clouds containing these droplets produce rainfall or other precipitation with carbonic acid
http://www.ehow.com/facts_7366580_normal-unpollute...
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Normal unpolluted rain water is acidic because, it contains carbonic acid . The carbon dioxide naturally present in the air is dissolved in rain water . Unpolluted ...
The natural pH of rain-water is 5.6. PH (potential of hydrogen) is a measure of the acidity in a substance and is measured on a scale of 0 to 14 with a high pH ...