Rainwater is not actually getting less acidic. it is actually getting more acidic! the more greenhouse gases we use (e.g: carbon dioxide) the more acidic our rain gets! This occurs because the more fossil fuels and greenhouse gases get thrown carelessly into the oceans, lakes and rivers; the more acidic they get. This means that when the water evaporates into the air, it is more acidic then it's usual neutral (7 on the pH scale). This is also affecting global warming and killing the sea animals by taking all the oxygen from the water and replacing it with harmful substances.
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reacting with the water to form carbonic acid. :)
Unpolluted rain should be neutral but many pollutants are acidic (oxides, dioxides and trioxides of Sulphur and Nitrogen in particular). These can become dissolved in rainwater it cause it to become acidic.
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Less than 7.0 is considered acidic.
Because rainwater is mildly acidic. Acid in the rainwater dissolves the limestone.
because it does not contain acid
Rain water is generally acidic
The rainwater would be acidic with a pH less than 5.6.
That depends where you live. Acidic rainwater is not always better than groundwater.
Erosion I think :-)
Yes it can
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Rainwater is normally acidic because the carbon dioxide in the air which mixes with rainwater to form weak acid. That's why its acidic ^_^ Rainwater is also because of the pollutions in the air and it mixes with the water so its not good. meee!
salt salt makes it more acidic
Could be either, although it's essentially rainwater, which is normally acidic.
The rainwater is more acidic after passing through polluted air.