2.2 and 2.3 Reactions of Carbonates/The Limestone Cycle Flashcards

1
Q

Name 2 metal carbonates that cannot get hot enough to decompose in a Bunsen burner

A
  • sodium carbonate

* potassium carbonate

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2
Q

What happens when all metal carbonates react with acid?

A

A salt, water and carbon dioxide is produced

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3
Q

Why is limestone damaged by acid rain?

A

The calcium carbonate in the limestone reacts with acids in the rain

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4
Q

Why is limewater used to test for carbon dioxide?

A

Limewater turns cloudy because when it reacts with carbon dioxide it starts producing insoluble calcium carbonate

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5
Q

What is produced when calcium carbonate is heated strongly?

A

Decomposes to calcium oxide and carbon dioxide

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6
Q

What is produced when a little water is added to calcium oxide?

A

Calcium hydroxide

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7
Q

What pH is calcium hydroxide?

A

Alkali

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8
Q

Name 2 real life uses of calcium hydroxide

A
  • farmers use it to neutralise acidic soils

* industries neutralise acidic gases

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9
Q

What is produced when more water is added to calcium hydroxide?

A

Limewater

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10
Q

How soluble is calcium oxide in water?

A

Not very, but it dissolves slightly to make limewater

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11
Q

What happens when carbon dioxide is added to limewater?

A

It turns cloudy and then produces calcium carbonate

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12
Q

What are the chemical symbols for
•calcium carbonate
•calcium oxide
•calcium hydroxide

A
  • CaCO3
  • CaO
  • Ca(OH)2
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13
Q

What happens to all metal carbonates when they are heated strongly enough?

A

They decompose to the metal oxide and carbon dioxide

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