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AQA GCSE - Chemistry > 1.2 (P1) Limestone > Flashcards

1.2 (P1) Limestone Flashcards

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1
Q

What is limestone?

A

A naturally occurring resource

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2
Q

What is the chemical name and symbol for limestone?

A

Calcium Carbonate

CaCO3

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3
Q

How do you obtain limestone?

A

It has to be quarried

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4
Q

What kind of rock is limestone?

A

Sedimentary

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5
Q

How is sedimentary rock formed?

A

The remains of dead sea creatures

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6
Q

What is the first stage in the limestone reaction cycle?

A

Thermal decomposition

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7
Q

What is thermal decomposition?

A

Breaking down by heat

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8
Q

What is thermal decomposition performed in?

A

Lime Kilns

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9
Q

What is another name for calcium oxide?

A

Quick lime

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10
Q

What is a bi product of the first stage of the limestone reaction cycle?

A

Carbon dioxide

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11
Q

After thermal decomposition what does calcium carbonate turn into?

A

Calcium oxide
And
Carbon dioxide

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12
Q

What is the second stage in the limestone reaction cycle?

A

Add a few drops of water

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13
Q

What does calcium oxide turn into after the second stage of the limestone reaction cycle?

A

Calcium hydroxide (solid)

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14
Q

What is another name for calcium hydroxide?

A

Slaked lime

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15
Q

What is calcium hydroxide used for?

A

It is an alkali so neutralise acids
Eg
In agriculture on acidic soil
In industry to neutralise acidic gases

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16
Q

Is calcium hydroxide very soluble in water?

A

No

17
Q

Do metal carbonates react in similar ways?

A

Yes

18
Q

When heated strongly enough what do metal carbonates decompose to?

A

A metal oxide
And
Carbon dioxide

19
Q

How do we know if CO2 is present?

A

It turns limewater cloudy

20
Q

What two carbonates can a Bunsen burner not get hot enough to decompose?

A

Sodium or Potassium

21
Q

What do carbonates react with acids to produce?

A

A salt, water and carbon dioxide

22
Q

What is limestone damaged by?

A

Acid rain

23
Q

What is the third stage of the limestone reaction cycle?

A

Add more water

24
Q

What does calcium hydroxide turn into after the third stage of the limestone reaction cycle?

A

Calcium hydroxide

aqueous solution

25
Q

When calcium hydroxide dissolves slightly what is another name for it?

A

Lime water

26
Q

What is the fourth stage of the limestone reaction cycle?

A

Add carbon dioxide

27
Q

What does calcium hydroxide become after the fourth stage of the limestone reaction cycle?

A

Calcium carbonate

Limestone

AQA GCSE - Chemistry (19 decks)

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