2.2 and 2.3 Reactions of Carbonates/The Limestone Cycle Flashcards Preview

GCSE Chemistry 1.2 Rocks and Building Materials > 2.2 and 2.3 Reactions of Carbonates/The Limestone Cycle > Flashcards

Flashcards in 2.2 and 2.3 Reactions of Carbonates/The Limestone Cycle Deck (13)
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1

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

•sodium carbonate
•potassium carbonate

2

What happens when all metal carbonates react with acid?

A salt, water and carbon dioxide is produced

3

Why is limestone damaged by acid rain?

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

4

Why is limewater used to test for carbon dioxide?

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

5

What is produced when calcium carbonate is heated strongly?

Decomposes to calcium oxide and carbon dioxide

6

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

Calcium hydroxide

7

What pH is calcium hydroxide?

Alkali

8

Name 2 real life uses of calcium hydroxide

•farmers use it to neutralise acidic soils
•industries neutralise acidic gases

9

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

Limewater

10

How soluble is calcium oxide in water?

Not very, but it dissolves slightly to make limewater

11

What happens when carbon dioxide is added to limewater?

It turns cloudy and then produces calcium carbonate

12

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

•CaCO3
•CaO
•Ca(OH)2

13

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

They decompose to the metal oxide and carbon dioxide