Chapter 2 Core Chem Aqa

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What is limestone used to make
Calcium oxide and cement
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How do we make concrete
Mixing cement with sand, aggregate and water
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What is the chemical name for limestone
Calcium carbonate
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What happens when calcium carbonate is heated strongly?
Decomposes to make calcium oxide and carbon dioxide
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What is the type of reaction called?
Thermal decomposition
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What does thermal decomposition mean?
Breaking down by heating
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What happens to metal carbonate when it's heated strongly enough
Metal oxide and carbon dioxide
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Why can't a Bunsen flame decompose sodium/potassium carbonate
It can't get hot enough
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Why is limestone damaged by acid rain
Calcium carbonate in limestone reacts with acids in rain
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What is limewater used to test
If carbon dioxide is present
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What product is produced when water is added to calcium oxide
Calcium hydroxide
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Calcium hydroxide is an acid or an alkali?
Alkali
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Why is Calcium hydroxide used by farmers
To neutralise acidic soils
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How do you make cement
Limestone Is mixed with clay and heated strongly in kiln
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What does cement + sand + water make
Mortar
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How is concrete made
Adding aggregate to cement sand and water
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3 advantages of quarrying limestone
Improved roads, new jobs for locals, more customers and trade for local businesses
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3 disadvantages of quarrying limestone
Loss of habitats for wildlife, more traffic, dust and noise
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Card 2

Front

How do we make concrete

Back

Mixing cement with sand, aggregate and water

Card 3

Front

What is the chemical name for limestone

Back

Preview of the front of card 3

Card 4

Front

What happens when calcium carbonate is heated strongly?

Back

Preview of the front of card 4

Card 5

Front

What is the type of reaction called?

Back

Preview of the front of card 5
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