Using the letters from the word ‘limestone’, write one key word associated with limestone for each letter For instance; ◦ L = Light grey in colour.

Using the letters from the word ‘limestone’, write one key word associated with limestone for each letter

For instance;◦ L = Light grey in colour◦ I = Is used in...◦ M = M...◦ E =

L I M E S T O N E

Metal carbonate•Describe reactions of limestone

•Explain the decomposition reaction of metal carbonates

What is limestone?

Match the chemical name with the chemical formulaCO2

COCaOMgCO2

MgCO3

CaCOMgOCaCO2

CaCO3

Magnesium carbonate

Calcium oxide

Magnesium oxide

Carbon dioxide

Calcium carbonate

Match the chemical name with the chemical formulaCO2

COCaOMgCO2

MgCO3

CaCOMgOCaO2

CaCO3

Magnesium carbonate

Calcium oxide

Magnesium oxide

Carbon dioxide

Calcium carbonate

Using the cards Find the required compounds to make your

equations!

Make the thermal decomposition reaction of limestone◦ What are the products of this reaction?

Make the reaction which produces calcium hydroxide.◦ What is the chemical formula for calcium hydroxide?

Write the thermal decomposition reaction of limestone◦ What are the products of this reaction?

Write the reaction which produces calcium hydroxide.◦ What is the chemical formula for calcium

hydroxide?◦ What is calcium hydroxide used to test for the

presence of?

Limestone

Using Ca(OH)2

we can test for carbon

dioxide Bubble gas through test tube of limewater

Ca(OH)2 (aq)

If carbon dioxide is present, limewater will turn milky

If carbon dioxide is not present, limewater will remain clear

Test for carbon dioxide

Elements which are found in group 1 or 2 They have 1 or 2 electrons on their outer

shell and react similarly to each other They are usually hard, malleable, high

melting points They conduct

electricity

What is a metal?

A COMPOUND consisting of:◦ A carbon atom◦ 3 oxygen atoms◦ This has a negative charge so tends to bond with

positively charged ions

A METAL carbonate consists of:◦ A carbon atom◦ 3 oxygen atoms◦ A metal also

What is a carbonate?

Using what you know about metal and about carbonates, suggest three more examples of metal carbonates

Metal carbonates

Ag2CO3

CoCO3

When heated calcium carbonate will have broken down into calcium oxide and carbon dioxide

This is the same for all metal carbonates

What would the reactions be for sodium and magnesium?

Decomposition of metal carbonates

What would the chemical reaction be if you heated:◦ Sodium carbonate◦ Magnesium carbonate◦ Pick a third metal of your choice

Suggest why you think that metal carbonates all react similarly when heated

Summary questions