C1 2.3 and C1 2.4 Flash Cards

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What do we get when we add water to calcium oxide?
Calcium hydroxide
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How do we get limewater?
We dissolve a little bit of calcium hydroxide in water, then filter it
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What can we use limewater for?
Testing for carbon dioxide
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What is a neutralisation reaction?
When an alkali reacts with an acid and neutralises it, or vice versa
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How is cement made?
Cement is made by heating limestone with clay in a kiln
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How is mortar made?
Mortar is made by mixing cement and sand with water
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How is concrete made?
Concrete is made by mixing aggregate, cement, sand and water
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A disadvantage of using lime mortar for a pond?
It doesn't harden when it comes into contact with water
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What is reinforced concrete?
When wet concrete is poured around steel rods or bars and then allowing it to set
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What is mortar used for?
Sticking bricks together when building
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When water is added to calcium oxide, what does this reaction give off?
Large amounts of heat
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How is lime mortar effective at sticking bricks together?
It works because the lime in the mortar reacts with carbon dioxide in the air, producing calcium carbonate. This makes the bricks effectively hold together by rocks
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What else can Calcium hydroxide be used for? Why can it be used for this purpose?
Raising the pH of acidic soil because it is an alkali
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Other cards in this set

Card 2

Front

How do we get limewater?

Back

We dissolve a little bit of calcium hydroxide in water, then filter it

Card 3

Front

What can we use limewater for?

Back

Preview of the front of card 3

Card 4

Front

What is a neutralisation reaction?

Back

Preview of the front of card 4

Card 5

Front

How is cement made?

Back

Preview of the front of card 5
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