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core chemistry (mine) > Limestone and building materials > Flashcards

Limestone and building materials Flashcards

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1
Q

What can you use calcium oxide for?

A

Neutralise acidic lakes and soils

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2
Q

What happens to the strength of concrete the more sand you add

A

More sand the weaker the concrete

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3
Q

Name 3 advantages of quarrying limestone

A
  • creates jobs
  • makes money for economy
  • gives people jobs
  • is restored after
  • gives is valuable limestone
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4
Q

What is the test for CO2

A

Limewater

Goes from clear to cloudy

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5
Q

What is thermal decomposition?

A

The breaking down of substances using heat

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6
Q

What is the symbol equation for calcium hydroxide

A

CO(OH)2

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7
Q

What is the chemical name for CO(OH)2

A

Calcium hydroxide

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8
Q

What is the chemical name for CaO

A

Calcium oxide

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9
Q

What is the symbol equation for calcium carbonate

A

CaCO3

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10
Q

What is the chemical name for limestone

A

Calcium carbonate

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11
Q

Name 3 disadvantages of quarrying limestone

A
  • noisy
  • messy
  • destroys habitats
  • increases traffic
  • destroys areas of natural beauty
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12
Q

What do you get when you heat calcium carbonate

A

Calcium oxide and carbon dioxide

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13
Q

What are the four stages of the limestone cycle

in order

A 
1) limestone
(Calcium carbonate)
2) quick lime
(Calcium oxide)
3) slaked lime
(Calcium hydroxide)
4) limewater
(Calcium hydroxide solution)
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14
Q

What is the symbol equation for calcium oxide

A

CaO3

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15
Q

What is the symbol equation for slaked lime

A

Ca(OH)2

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16
Q

What is the symbol equation for limewater

A

CA(OH)2

17
Q

What do you get when you add a little bit a water to calcium oxide

A

Calcium hydroxide

18
Q

What do you get when you add water to calcium hydroxide

A

Calcium hydroxide solution

19
Q

What do you get when you add carbon dioxide to calcium hydroxide solution

A

Calcium carbonate

20
Q

What is the generic name for calcium carbonate

A

Limestone

21
Q

What is the generic name for calcium oxide

A

Quick lime

22
Q

What is the generic name for calcium hydroxide

A

Slaked lime

23
Q

What is the generic name for calcium hydroxide solution

A

Lime water

24
Q

How do you make cement?

A

Powdered limestone is heated up with powdered clay

25
Q

How do you make mortar

A

Cement is mixed with sand and water

26
Q

How do you make concrete

A

You mix cement with sand and aggregate (water and gravel)

27
Q

What is the word equation for thermal decompostion

A

Calcium carbonate
Heat
—–> calcium oxide + carbon dioxide

28
Q

What is the symbol equation for thermal decomposition

A

CaCO3
Heat
——-> CaO + CO2

core chemistry (mine) (7 decks)

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