C1 Limestone

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Where is limestone from?
Quarries
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What are the positives of limestone quarrying?
Building materials, the economy, old quarries->nature reserve
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How does the economy get benefitted?
More jobs. Quarry worker spend money in shops=more jobs
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What are the negatives of quarrying?
Sound pollution, dust pollution, vehicles, congestions
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Give an example of quarrying sound pollution.
Explosions
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Suggest how dust pollution affects people.
It makes asthma in asthmatics worse.
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Suggest why vehicles are bad.
More petrol burning=>more carbon dioxide=>global warming
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What type of reaction is thermal decomposition?
Endothermic
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What is thermal decomposition?
Breaking down by heating
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What is limestone's chemical name?
Calcium carbonate - CaCO3
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Give the balanced equation of the thermal decomposition of limestone.
CaCO3 (+heat) --> CaO + CO2
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What is limestone usually used for?
Cement, mortar and concrete
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How do we make cement?
Limestone + Clay (heat in kiln) --> Cement
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How do we make mortar?
Cement + Sand (+water) --> Mortar
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How do we make concrete?
Cement + Sand + Gravel (+water) --> Concrete
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What is concrete used for?
To make buildings
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What is the equation for making calcium hydroxide?
CaO + H2O --> Ca(OH)2
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As Ca(OH)2 is an alkali, what do we use it for?
Neutralising acids (eg/ acidic soil)
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How do we make calcium hydroxide solution?
Add more water to the calcium hydroxide.
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What is calcium hydroxide solution also known as?
Limewater.
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What is limewater used for?
Testing for the gas CO2. Turns cloudy when CO2 is added.
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How do we form calcium carbonate (CaCO3) from limewater?
Bubble CO2 though the limewater.
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What do we get when we react a carbonate with an acid?
Carbonate + Acid-->Salt + Water + Carbon Dioxide
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What is the salt? Calcium carbonate + hydrochloric acid.
Calcium chloride.
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What are the three salt endings from the three acids?
H2SO4 - Sulfate, HCl - Chloride, HNO3 - Nitrate
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What does the reaction often tell us?
That limestone buildings often break down from the acid.
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Other cards in this set

Card 2

Front

What are the positives of limestone quarrying?

Back

Building materials, the economy, old quarries->nature reserve

Card 3

Front

How does the economy get benefitted?

Back

Preview of the front of card 3

Card 4

Front

What are the negatives of quarrying?

Back

Preview of the front of card 4

Card 5

Front

Give an example of quarrying sound pollution.

Back

Preview of the front of card 5
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