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The Thermal Decompasition Of Copper Carbonate

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Decomposition of Copper Carbonate Introduction Copper has two oxides, Cu2O and CuO. Copper carbonate, CuCO3, decomposes on heating to form one of these oxides and an equation can be written for each possible reaction. Equation 1: 2CuCO3 (s) > Cu2O (s) + 2CO2 (g) + 1/2O2 (g) Equation 2: CuCO3 (s) > CuO (s) + CO2 (g) Apparatus 1) Scales capable of weighing out 0.01g 2) An 100cm3 gas syringe with bung 3) A Test Tube 4) Bunsen burner 5) Heatproof mat 6) 0.411g Copper Carbonate 7) Safety goggles 8) Clamp and clamp stand 9) Gas syringe holder 10) Weigh boat Background * Cu2O is also know as known as cuprous oxide. * It is insoluble in water and organic substances. * It is found as the mineral cuprite in some red-coloured rocks. * When it is exposed to oxygen, copper will naturally oxidize to cuprous oxide, but this takes a lot of time for it to happen. ...read more.


* Now I need to work out the weight of CuCO3 I will need in the experiment so the gas syringe wont overflow so firstly I will then convert 30dm3 into 30000 cm3 to make it an easier sum overall. * I will then divide by 100 as this the volume of the gas syringe, this makes 300 cm3. * Then I will finally work out mass by dividing the molar mass of CuCO3 which is 123.5, with the 300cm33 * This then works out to be 0.41166666767g of CuCo3. Method Firstly weigh the CuCO3 carefully by weighing out 0.411g of the substance, taking into account the weight of the weigh boat and then after the weighed substance has been placed in the conical flask, weigh the boat again to make sure that no substance has been left over. Carry this process on if needed until 0.411g of CuCO3 is reached. Place the weighed mass of CuCO3 into the test tube and insert the bung to make sure that no gas can escape ...read more.


Secondly I can make sure that the bung on the test tube is pushed on tight so no gas is lost and the experiment isn't incorrect by it. I also need to take into account that my glassware and equipment does have a percentage of error, although this should not affect my experiment too much as it will be quite clear which oxide it will be with the colour and the obvious difference in volume of gas given off. In my experiment I will also need to think of safety as it is a key factor to keep myself safe and clear of dangers. I will need to be aware of the Bunsen burner and Bunsen burners, I will help with this by clearing the area and standing at all times. Also with a great deal of heat being applied to the test tubes they can shatter so I must wear goggles just encase they do and go in my eye. ...read more.

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