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CHEMISTRY
Group Members: WanQin, Delia, PeiPei & Marie

Hey , You are welcoming here .
This is our chemistry project this year (2012).
Our topic is on heating of metal carbonates,
we hope that you will learn something from here.

Thursday, 6 September 2012, 23:30
Experiments & Equations


EXPERIMENTS
Apparatus set-up
1. Add a large spatula measure of the carbonate in a test-tube.
2. Fit a delivery tube into the test tube and then clamp the test-tube so that the delivery tube dips into a second test-tube containing 2-3 cm3 limewater.
3. Heat the solid slowly at first, then more strongly.
4. Repeat the experiment with the other metal carbonates given, and write down your observations for each of the reaction.

 Carbonate
 Colour (before being heated)
 Colour (after being heated)
 Gas given out
 Potassium Carbonate
 white
 white 
 none
 Sodium Carbonate
 white
 white
 none
 Zinc Carbonate
White
 yellow then white when cooled
 Carbon dioxide
 Lead Carbonate
 white
 yellow
 Carbon dioxide
 Copper Carbonate
 green
 black
 Carbon dioxide


Chemical Equations:
  • K2CO3 --> no reaction
  • Na2CO3 --> no reaction
  • CaCO3 --> CaO + CO2
  • MgCO3 --> MgO + CO2
  • ZnCO3 --> ZnO + CO2
  • FeCO3 --> FeO + CO2
  • PbCO3 --> PbO + CO2
  • CuCO3 --> CuO + CO2
  • Ag2CO3 --> Ag2O + CO2