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GCSE Chemistry > Limestone Cycle > Flashcards

Limestone Cycle Flashcards

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1
Q

Limestone chemical name

A

Calcium carbonate
CaCO3

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2
Q

Quicklime chemical formula

A

Calcium oxide
CaO

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3
Q

Slaked lime

A

Calcium hydroxide
Ca(OH)2

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4
Q

Limewater

A

Calcium hydroxide
Ca(OH)2

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5
Q

Thermal decomposition

A

Limestone —> calcium oxide
CaCO3 —> CaO + CO2

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6
Q

What physical effect does heating calcium carbonate show

A

It glows

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7
Q

What happens to green copper sulfate when it is heated

A

Turns black

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8
Q

Describe a practical experiment to demonstrate carbon dioxide is given off when metal carbonates are heated

A

1) Heat metal carbonate in a boiling tube
2) bubble the gas produced through limewater
3) if it turns cloudy CO2 is present

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9
Q

Please Send Carols Monkeys And Chocolate Zebras In To Lead Hippo Cupboards Securely Guarded Please

A

Potassium, sodium, calcium, magnesium, aluminium, carbon, zinc, iron, tin, lead, hydrogen, copper, silver, gold, platinum

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10
Q

How does the reactivity of metal affect the stability of metal carbonate

A

The more reactive the metal, the more stable the metal carbonate

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11
Q

Will sodium carbonate decompose with use of a Bunsen burner

A

No

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12
Q

Quicklime —> slaked lime

A

CaO + H2O —> Ca(OH)2
Exothermic reaction
Produces steam

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13
Q

Describe Slaked lime —> limewater reaction

A
  • Exothermic - produces steam
  • hisses
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14
Q

Limewater —> limestone symbol equation

A

Ca(OH)2 + CO2 —> CaCO3 + H2O

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15
Q

Uses of limestone (4)

A
  • neutralise soil acidity
  • make cement
  • production of iron and steel
  • road building
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16
Q

How is limestone used in extraction of iron

A

It removes impurities as it forms slag that is less dense than iron so it floats on top

17
Q

Limestone quarrying advantages explained (3)

A
  • vital building material - sold to improve local economy
  • provides employment - improve local economy
  • roads and transport needed to transport limestone improve local transportation
18
Q

Disadvantages of quarrying limestone explained (5)

A
  • blasting causes noise and air pollution
  • dust causes increased number of respiratory conditions
  • transport of limestone causes increase in traffic
  • destruction of landscape creates visual pollution
  • destruction of landscape destroys wildlife habitats
19
Q

What happens when metal carbonates are heated

A

They undergo thermal decomposition

20
Q

What happens when metal carbonates thermally decompose

A

They form metal oxide and carbon dioxide

21
Q

What pH is slaked lime

A

Alkaline

22
Q



A

GCSE Chemistry (6 decks)

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