1. L I M E S T O N E
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 =

2. Metal carbonate Describe reactions of limestone
Explain the decomposition reaction of metal carbonates

3. What is limestone?

4. Match the chemical name with the chemical formula
CO2 CO
CaO
MgCO2
MgCO3
CaCO
MgO
CaCO2
CaCO3
Magnesium carbonate
Calcium oxide
Magnesium oxide
Carbon dioxide
Calcium carbonate

5. Match the chemical name with the chemical formula
CO2 CO
CaO
MgCO2
MgCO3
CaCO
MgO
CaO2
CaCO3
Magnesium carbonate
Calcium oxide
Magnesium oxide
Carbon dioxide
Calcium carbonate

6. 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?

7. Limestone 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?

8. Test for carbon dioxide
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

9. What is a metal? 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

10. What is a carbonate? 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 metal also

11. Metal carbonates Ag2CO3 CoCO3
Using what you know about metal and about carbonates, suggest three more examples of metal carbonates
Ag2CO3
CoCO3

12. Decomposition of metal carbonates
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?

13. Summary questions 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