acid rain. first, we need to understand acidity and basicity. this is measured on a scale called the...
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![Page 1: Acid Rain. First, we need to understand acidity and basicity. This is measured on a scale called the pH scale. pH is a scale from 0 to 14. 0 is about](https://reader035.vdocuments.net/reader035/viewer/2022081603/56649e395503460f94b2a409/html5/thumbnails/1.jpg)
Acid Rain
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First, we need to understand acidity and basicity.
This is measured on a scale called the pH scale.
pH is a scale from 0 to 14. 0 is about as acidic as it gets, while 14 is about as alkaline as it gets.
Pure water has a pH of 7.
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What is acidity?
• It is a measure of dissolved Hydrogen ions (H+)• This H+ likes to attract negative charges, so the
more H+ you have in an acid, the more it “dissolves” things.
• Weaker acids, like orange juice or soda, have less dissolving power.
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What is basicity?
• Same thing as acids, except now we are talking about an (OH-)
• The hydroxide ion likes to attract positive molecules and “dissolves” better the more OH- it has.
• Things like ammonia or soap are bases (soap eats the oily layer on your skin. Too much soap will eat too much and you dry out your skin.)
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Now, to the problem
• Sulfur dioxide and nitrous oxides are caused by the burning of coal and petroleum products in cars and power plants.
• Also found in cigarette smoke.
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• SO2 + OH → HOSO2
• HOSO2 + O2 → HO2 + SO3
• SO3 (g) + H2O (l) → H2SO4 (l) [sulfuric acid]
• NO2 + OH → HNO3 [nitric acid]
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So, what does acid rain do?
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