Acid deposition questions

Assignment: Questions on Topic 8.5 : Acid deposition

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Carbon dioxide is naturally present in rain water as carbonic acid.

i.  Explain why pure rain water containing dissolved carbon dioxide cannot have a pH lower than 5.6.

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ii. How much more acidic than rain water with a pH of 5.6 is a sample of acid rain with a pH of 4.6 ?

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i.  Nitrogen oxide, NO, is produced in car engines. Give the equations to show how it eventually forms nitric acid, HNO3 and nitrous acid, HNO2 in the atmosphere.

 

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ii. Sulfur dioxide, SO2, is formed when S-containing fossils fuels are combusted. Give the equations to show how it eventually forms sulfuric acid, H2SO4, and sulphurous acid, H2SO3, in the atmosphere.

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3. Describe and explain how acid rain affects the growth of trees.

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The image shows a statue of a lion in Leeds, U.K. that has been badly affected by acid deposition.

 

 

 

 

 

 

 

 

Give the ionic equation for the reaction of acid with the carbonate ions in the statue.

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Explain how adding either calcium hydroxide or calcium oxide can counter the effects of acidification of lakes.

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