The Thermal Decomposition of Copper Carbonate
Copper carbonate goes through thermal decomposition to form one of these oxides. The two possible equations are:
Equation 1: 2CuCO(s) CuO (s) + 2 CO (g) + 1/2 O (g)
Equation 2: CuCO (s) CuO (s) + CO (g)
To find out which of the above equations is correct. I will use the mole theory to work out the expected volume of gas released. This predicted will volume will prove which of the two equations is correct.
00 cm³ gas syringe
2 retort stands
Delivery tube through bung
Heat Proof Mat
Top pan Balance
Powered Copper Carbonate
Amounts and Errors
I will collect the amount of gas produced in a gas syringe, and aim to collect approximately 80cm³ . This volume is far enough from the 100cm³ to account for any errors that may cause the volume to increase beyond the scale, if too much gas is evolved. The gas syringes available have a maximum volume of 100cm³, hence why the chosen volume is lower than 100cm³.
There is also the possibility of the gas expanding in the heat, and resulting in the gas having a larger volume than the available volume in the gas syringe. To overcome this problem I will need to let the gas cool before measuring the volume, and may need to cool the gas as it enters the gas syringe.