Reactions of Calcium Compounds

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  • Created by: shareen6
  • Created on: 10-05-16 15:30
What happens when Calcium Carbonate is heated?
It undergoes thermal decomposition to form Calcium Oxide and Carbon Dioxide.
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What happens when water is added to Calcium Oxide?
A lot of heat is released and it crumbles to a white powder of Calcium Hydroxide.
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What reactions can you see happening to the Calcium Oxide?
It fizzes and lets off steam.
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What happens if you add more water to the reactants.
The Calcium Hydroxide dissolves to form a solution called Limewater.
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What are Calcium Carbonate, Calcium Oxide and Calcium hydroxide also known as?
Calcium Carbonate- Limestone Calcium Oxide- Quicklime, Calcium Hydroxide: Slaked Lime -Solid version. Limewater- Liquid version.
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How can you use Limewater to test for Carbon Dioxide?
If Carbon Dioxide is bubbled through Limewater it forms insoluble Calcium Carbonate. This turns the Limewater milky/cloudy.
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What can be used to neutralise acidic compounds?
Calcium Carbonate, Calcium Oxide and Calcium Hydroxide.
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How and why do farmers deal with acidic soils?
If the soils are too acidic crops don't grow too well so farmers spray powdered Calcium compounds to reduce or neutralise the acidity in the soil.
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Why do waste gases in powers stations need to be neutralised?
Coal fired power stations release Sulphur Dioxide and Nitrogen Oxides which are acidic gases. If they are released into the atmosphere they can cause acid rain.
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How are waste gases in powers stations neutralised?
Wet, powdered clay is sprayed onto the waste gases to neutralise them.
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Other cards in this set

Card 2

Front

What happens when water is added to Calcium Oxide?

Back

A lot of heat is released and it crumbles to a white powder of Calcium Hydroxide.

Card 3

Front

What reactions can you see happening to the Calcium Oxide?

Back

Preview of the front of card 3

Card 4

Front

What happens if you add more water to the reactants.

Back

Preview of the front of card 4

Card 5

Front

What are Calcium Carbonate, Calcium Oxide and Calcium hydroxide also known as?

Back

Preview of the front of card 5
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