Acid Rain

• http://www.youtube.com/watch?v=Nc6j7zz1_do&feature=related

Acid RainWALT -

• be able to state how acid rain is formed,

•and write a word equation to show this reaction.

• be able to predict the effect of acid rain on living material and carry out an experiment to test this prediction.

Where does acid rain come from?

Pollutants from fossil fuels

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ACID RAIN

ACID RAIN

ACID RAIN

ACID RAIN

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ACID RAIN WORD EQUATION

Sulfur dioxide + water  → Sulfuric acid

ExperimentYou are going to investigate how acid rain affects the growth of cress seedlings.

Decide what things must be controlled (kept the same) in order for this to be a fair test.

Other pollutants

Unburnt carbon and other particulates have been linked to asthma and cancer.

High temperatures, such as those in a car engine, can allow nitrogen to react with oxygen to form poisonous nitrogen oxides which can also damage lungs and cause acid rain.

Acid Rain: Sources of acid rain 1. What fuel is burned in a power station?•__________________________2. Where is this fuel from? __________________________• 3. Why is this fuel burned in a power station? ________________________________________4. What gas is produced when coal is burned in a power station?________________________________________

5. What gases is produced when fuel is burned in cars?________________________________________

Acid Rain: Sources of acid rain 1. What fuel is burned in a power station?•Coal / Oil2. Where is this fuel from? Mined from under the ground• 3. Why is this fuel burned in a power station? •To generate electricity4. What gas is produced when coal is burned in a power station?•Sulphur Dioxide5. What gases are produced when fuel is burned in cars?•Nitrogen oxides

Formation of acid rain

6. What reaction occurs when Sulphur Dioxide and Nitrogen Oxides react with water in rain clouds?

Hint : Oxygen is added

•________________________________________

Formation of acid rain

6. What reaction occurs when Sulphur Dioxide and Nitrogen Oxides react with water in rain clouds?

Hint : Oxygen is added

•Oxidation reaction

• 7. Name the 2 acids produced in the rain clouds?

• ____________________________• ____________________________

• 7. Name the 2 acids produced in the rain clouds?

• Sulphuric Acid• Nitric Acid

The problems with Acid Rain.

• 8. Why does Acid rain produced in the UK cause problems in other countries such as Sweden and Norway? ________________________________________

9. How does Acid Rain make lake waters acidic?________________________________________

The problems with Acid Rain.• 8. Why does Acid rain produced in the

UK cause problems in other countries such as Sweden and Norway?

• Winds blow the clouds and therefore the acid rain to other areas

9. How does Acid Rain make lake waters acidic?

•Rains fall on the lake taking the acid with them and lowering the pH

• http://www.youtube.com/watch?feature=endscreen&NR=1&v=OOifV9EcbVk

Acid Rain 2

WALT – Use a diagram to explain the formation of acid rain

WILF -

Complete, labeled diagram explaining how acid rain is formedQuestions answered

• Draw a labelled diagram in your books explaining the formation of acid rain

• Include :

• Factories, cars, clouds and lakes/ rivers/ sea

Using the information in your books, answer :

a. Define leachingb. How does aluminium leaching from the

soil affect fish?

• 1. Why would unpolluted rain water be classified as acidic?

• ____________________________________________________________________________________________________

• 2. What is the pH of unpolluted rain water – does this match your answer to question 1?

• __________________________________________________

• 3. What are the gases that cause acid rain? • _____________________________________________

_____ • 4. Where does sulphur dioxide come from?

• 5. Where does nitrogen dioxide come from? • _________________________________________________

___________________________________________________

• 6. Why is acid rain a problem? • _________________________________________________

___________________________________________________

• 7. How does acid rain affect trees? • _________________________________________________

_ • 8. How does acid rain affect fish? • _________________________________________________

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