To find out how much zinc oxide is contained in Calamine.

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Science Coursework

To find out how much zinc oxide is contained in Calamine

By Ben Marlow – 11RJ

Aim: Produce a conversion chart which shows how much zinc oxide can be made by experiment from heating different masses of zinc carbonate. Also produce a conversion chart showing the theoretical values worked out from the equation, compare the two charts.

Plan: We will heat the zinc carbonate in measurements of 1, 1.5, 2, 2.5 and 3 grams in boiling tubes over a Bunsen burner. At the end we will measure the difference in wait to find out the amount of zinc oxide present. We will do this twice, to get two sets of results so we can analyse and compare them.             To gain the measurements needed, the results I shall record are:

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  • Empty test tube
  • Test tube + the zinc carbonate
  • Test tube + the zinc carbonate + mineral wool

The mineral helps to keep the vapour inside the test tube, to make sure that no yield is lost in the heating process.

Prediction:

I am expecting the weight to decrease after it has been heated, as some gas will be released when the reaction takes place. As our environment is not controlled it will be lost into the atmosphere.

Diagram of experiment:

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