1. Preparing Salts 2 – Metal Carbonates
WALT – Explain what is formed when a metal carbonate is added to an acid
WILF – Questions answered
Prepare for practical
Carry out practical

2. METAL + OXYGEN METAL OXIDE
Previously …
METAL + OXYGEN METAL OXIDE

3. METAL + WATER METAL OXIDE + HYDROGEN
METAL + WATER METAL HYDROXIDE + HYDROGEN

4. METAL + ACID SALT + HYDROGEN

5. And today ….

6. The reaction between acids and metal carbonates
When an acid reacts with a metal carbonate, a salt, water and carbon dioxide are produced:

7. Acid + metal carbonate  salt + H2O + CO2
sulphuric acid + zinc carbonatezinc sulfate +H2O + CO2

8. Small is beautiful!- particle size
WALT – Explain how Particle size affects the rate of reactions
WILF – Complete expt. With conclusions and evaluations

9. Which one will dissolve quicker and why ???
Discuss with your neighbour

10. When the particle is LARGE there is only a small surface area for the reactions
Small particles have lots of surface for reactions to take place

11. Can you draw this in your books? Add an explanation in your own words
Small Marble Chip
Large Marble Chip
Can you draw this in your books?
Add an explanation in your own words

12. When the particle is LARGE there is only a small surface area for the reactions
Small particles have lots of surface for reactions to take place

13. Using : Calcium Carbonate + HCl = Calcium Chloride + CO2 + H2O)
Half of the class will use marble chips (Calcium Carbonate )
Half will use powdered Calcium Carbonate

14. Weigh out 2 grams of each
Add them to 15 ml HCl which has also been weighed, recording the time it takes to dissolve them.

15. Time Taken to Dissolve (seconds)
Marble Chips
CaCO3

16. Place beaker on balance, press Zero.
Add 2 gm of CaCO3 We