Thermal Decomposition

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  • Created by: Hope
  • Created on: 29-05-14 11:37
What is limestone mainly made of?
Calcium carbonate
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What happens to calcium carbonate when it is heated?
It breaks down to form calcium oxide and carbon dioxide
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What happens when calcium oxide reacts with water?
It produces calcium hydroxide
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What is thermal decompostion?
When calcium carbonate breaks down when heated strongly
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What is the symbol equation for thermal decompostion?
CaCO3 = CuO+CO2
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What other metal carbonates decompose the same as calcium carbonate?
Sodium carbonate, magnesium carbonate and copper carbonate
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Complete this sentence: Metals high up in the reactivity series (sodium calcium and magnesium) have....
Carbonates that need a lot of energy to decompose them
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Why is copper used in schools to show how carbonates decompose?
Its low down in the reactivity series and so can be easily decomposed. Its colour change from green copper carbonate to black copper oxide is easy to see
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What colour is calcium oxide when it is hot/cold?
Hot = yellow, Cold = White
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What can limestone be used for and how is it extracted?
It is quarried and used as a building material, helps with making cement and concrete
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What is produced when carbonates react with acids?
Carbon dioxide, salt and water
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What is limestone mainly damaged by?
Acid Rain
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In a test to see if a carbonate is present what can you do?
Add the acid and have a tube running too a limewater tube, if it starts to fizz and carbondioxide is released the limewater will turn cloudy
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What can we do to neutralise excess acidity in lakes and soils effected by acid rain?
Heat limestone strongly to form calcium oxide, react with with water to form calcium hydroxide which is an alkali.
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What are the disadvantages of using limestone, cement and mortar in building materials?`
It slowly reacts with cabrondioxide in rain water and wears away, Acid rain damages, People think its unnattractive
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What are the advantages of using limestone, cement and mortar in building materials?
It can be easily fomed into different shapes, its strong when squashed, it can be made stronger by enforcing it with steel
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What are the advantages of the limestone industry?
Limestone is a natural resource, the quarrying provides jobs and is good for local economy
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What are the disadvantages of the limestone industry?
They are visable from long distances and are unnatractive also it creates noise and heavy traffic
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Other cards in this set

Card 2

Front

What happens to calcium carbonate when it is heated?

Back

It breaks down to form calcium oxide and carbon dioxide

Card 3

Front

What happens when calcium oxide reacts with water?

Back

Preview of the front of card 3

Card 4

Front

What is thermal decompostion?

Back

Preview of the front of card 4

Card 5

Front

What is the symbol equation for thermal decompostion?

Back

Preview of the front of card 5
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