C1.2 Flashcards

1
Q

What is the chemical formula for calcium carbonate?

A

CaCO3

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2
Q

Name some uses for limestone

A
  • As a raw material for making cement,mortar and concrete
  • As blocks and slabs for walls and pavements
  • As aggregate (small lumps) for the base of roads and railways
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3
Q

What are the ingredients mixed with limestone to make mortar and concrete?

A

Limestone is heated with clay,
To make mortar the limestone is mixed with cement and sand.
To make concrete the limestone is mixed with cement sand and aggregate.

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4
Q

Where is limestone taken from?

A

Taken from the ground in quarries

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5
Q

Name a good affect of quarrying

A

New jobs are created and limestone is valuable material for building

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6
Q

Name negatives of quarrying

A
  • Fewer tourists may visit an area that has a working quarry
  • extra traffic
  • noise, visual and atmospheric
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7
Q

What is thermal decomposition?

A

Many metal carbonates break down when heating, this is called thermal decomposition

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8
Q

What happens when calcium carbonate is heated?

A

It decomposes to form calcium oxide and carbon dioxide-

CaCO3=CaO+CO2

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9
Q

Name some other carbonates that decompose in the same way calcium carbonate does

A

Magnesium carbonate
Zinc carbonate
Copper carbonate

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10
Q

What happens when water is added to calcium oxide?

A

Reacts vigorously to make white solid called calcium hydroxide

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11
Q

What is calcium hydroxide?

A

An alkali

Alkalis bus solve in water to make alkaline solutions. They neutralise acids

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12
Q

What is the solution of calcium hydroxide in water?

A

Limewater

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13
Q

What is limewater used for?

A

It is used as a test for carbon dioxide, carbon dioxide turns limewater cloudy

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14
Q

What does limestone mostly consist of?

A

Calcium carbonate

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