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Obtaining Zinc Oxide from calamine Theory Calamine is a mineral that contains Zinc Oxide. Its composition is quite complicated but it can be considered to contain zinc carbonate (ZnCO3). Upon heating it decomposes as follows: ZnCO3 ZnO + CO2 (C=12, O=16, Zn=65) The equation allows you to calculate a theoretical conversion of the calamine into zinc oxide but how close to this can be achieve in practice? In the chemistry industry they need to be able to calculate %yields in order to make sure that their processes are economical. Aim This Experiment will try to produce a conversion chart which will show how much zinc oxide can be made by experimenting by heating different masses of zinc carbonate. These thus can be compared to the theoretical values worked out from the equation. Prediction I predict that the results in the test will not match those in the theoretical results. They will be either a little above it due to...

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