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GCSE Core Chemistry AQA > Chemistry Core A - Products From Rocks: Using Limestone > Flashcards

Chemistry Core A - Products From Rocks: Using Limestone Flashcards

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0
Q

Which type of material is limestone most commonly used for?

A

Limestone is most commonly used for building materials.

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1
Q

What is limestone often formed from?

A

Limestone is often formed from sea shells.

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2
Q

What compound makes up most of limestone?

A

Calcium Carbonate makes up most of limestone.

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3
Q

Where do we get limestone from?

A

Limestone is quarried out of the ground.

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4
Q

What type of buildings are made purely of limestone?

A

Old cathedral buildings are made purely from limestone.

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5
Q

Is limestone reactive?

A

Limestone is reactive.

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6
Q

What is produced when Calcium Carbonate thermally decomposes?

A

When Calcium carbonate thermally decomposes, it produces Calcium Oxide and Carbon Dioxide.

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7
Q

What is the chemical formula equation for the thermal decomposition of Calcium Carbonate?

A

CaCO₃ −heat−> CaO + CO₂

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8
Q

What other types of metal carbonates thermally decompose to produce an oxide and Carbon Dioxide?

A

When Magnesium; Copper; Zinc; and Sodium Carbonates decompose they all produce an Oxide and Carbon Dioxide.

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9
Q

When Magnesium Carbonate thermally decompose, what is produced?

A

When Magnesium Carbonate thermally decomposes it produces Magnesium Oxide and Carbon Dioxide.

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10
Q

What is the chemical formula equation for the thermal decomposition of Magnesium Oxide?

A

MgCO₃ −Heat−> MgO + CO₂

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11
Q

What determines the temperature at which a Carbonate will thermally decompose?

A

The group number that the Carbonates metal is in determines the temperature at which the Carbonate will thermally decompose. Some group one metal Carbonates can not be thermally decomposes with a Bunsen burner.

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12
Q

What is produced when Calcium Carbonate reacts with an acid?

A

When Calcium Carbonate reacts with an acid it produces a salt; Carbon Dioxide and water.

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13
Q

What is produced when Calcium Carbonate reacts with Sulphuric acid?

A

When Calcium Carbonate reacts with Sulphuric acid it produces Calcium Sulphate; Carbon Dioxide and water.

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14
Q

What is the chemical formula equation for the reaction between Calcium Carbonate and Sulphuric acid?

A

CaCO₃ + H₂SO₄ −> CaSO₄ + CO₂ + H₂O

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15
Q

What is the type of salt produced by the reaction between Calcium Carbonate and an acid dependant on?

A

The type of salt produced by the reaction between Calcium Carbonate and an acid is dependant on the type of acid.

16
Q

If a Carbonate reacts with Hydrochloric acid what will be the type of salt produced?

A

The type of salt produced will be a Chloride.

17
Q

What are the different type of metal carbonates that react with acids?

A

Magnesium; Copper; Zinc; and Sodium are all carbonates that react with acids.

18
Q

What is produced when Calcium Oxide reacts with water?

A

When Calcium Oxide reacts with water it produces Calcium Hydroxide.

19
Q

What is the chemical formula equation for the reaction between Calcium Oxide and water?

A

CaO + H₂O -> Ca(OH)₂

20
Q

Is Calcium Hydroxide an acid or an alkali?

A

Calcium Hydroxide is an alkali.

21
Q

What is Calcium Hydroxide used for neutralising?

A

Calcium Hydroxide is used for neutralising acidic soil.

22
Q

Why is Calcium Hydroxide a more favourable for neutralising acid, than crushed Limestone?

A

Both Calcium Hydroxide and crushed Limestone neutralise acidic soil; however, Calcium Hydroxide performs the task faster.

23
Q

How can Calcium Hydroxide be used to test for the presence of Carbon Dioxide in a gas?

A

If a Calcium Hydroxide and water solution (called Limewater) has gas bubbled through it and Carbon Dioxide is present; it will react with the Calcium Hydroxide to form a cloudy substance called Calcium Carbonate and water.

24
Q

What is the chemical formula equation for Calcium Hydroxide reacting with Carbon Dioxide?

A

Ca(OH)₂ + CO₂ −> CaCO₃ + H₂O

25
Q

How can Limestone be used to make cement?

A

Powdered limestone can be heated in a kiln with powdered clay to make cement.

26
Q

How can Limestone cement be used to make mortar?

A

Limestone cement can be mixed with sand and water to make mortar.

27
Q

How can Limestone cement be used to make concrete?

A

Limestone cement can be mixed with aggregate (gravel and water) to make concrete.

GCSE Core Chemistry AQA (6 decks)

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