Decomposition of Copper Carbonate on Heating Essay
Decomposition of Copper Carbonate on Heating
During my experiment, there is a chance of exposure to several chemicals, and some possibly dangerous procedures need to be carried out. Following is an outline of possibly dangerous chemicals or procedures, the hazards they present, and the precautions to be taken to minimise risk. Chemical or Procedure Hazard Precautions Heating with Bunsen Burner Burns Ensure Bunsen is on safety flame if unattended. Avoid handling Utilising Glassware Sharp if broken
Take care when handling, ensure it is clamped securely into position, but do not over tighten clamps. Copper Carbonate3 Irritation to eyes, harmful if swallowed. Wear safety goggles; avoid stirring up powder and any resulting ingestion. Cu(I)O Irritant to the eyes and upper respiratory tract. Metal fume fever. Wear safety goggles; avoid stirring up powder and any resulting inhalation. Cu(II)O Irritant to the eyes and upper respiratory tract. Metal fume fever.
Wear safety goggles; avoid stirring up powder and any resulting inhalation. Method For the experiment the equipment should be set up as shown: To perform the experiment correctly, the following procedure should be followed. 1) Collect all equipment listed in the equipment list 2) The weighing bottles should be placed on the scale, and the tare used to set that as the zero value. The required amount of copper carbonate should then be put into the weighing bottle using a spatula.
3) Transfer the copper carbonate to a boiling tube 4) Place a bung with delivery tube into the top of the boiling tube. 5) Place the boiling tube into position using one of the retort clamps, as shown in the diagram. 6) Attach a gas syringe to the other retort clamp 7) Insert the delivery tube of the bung into the rubber tubing of the gas syringe. 8) The gas syringe should be tilted very slightly, with the plunger end being lower, to counteract any resistance to motion due to friction.
9) The first reading should now be taken from the gas syringe, and then a Bunsen burner applied to the bottom of the boiling tube on the hottest flame until there is no further reaction. 10) Allow three minutes of heating, to ensure all of the copper carbonate has reacted. 11) At this point, it may be advisable to perform the first and second and third repeats of the experiment, as you should allow at least half an hour after each reaction for the gas to cool back to room temperature before taking a final reading.
The amount of gas produced can be calculated easily by subtracting the initial reading from the final reading, if this result is close to 80cm3, then it is the first reaction that is taking place, if the result is close to 64cm3 then it is the second. 1 “Science for Conservators: An Introduction to Materials”, Page 95, Routledge, 1992 2 Foundation Worksheet F29 (Hills Road Sixth Form College), Pages 1, 4 3 http://ptcl. chem. ox. ac. uk/MSDS/CO/copper_II_carbonate. html – 24/11/05
University/College: University of California
Type of paper: Thesis/Dissertation Chapter
Date: 7 July 2017
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