The Chemistry of the Change in Your Pocket

The Chemistry of Change in Your Pocket

If you look through the change in your pocket, and the copper coins in particular you will notice that they appear to be varying shades of red, orange or brown. Some are bright and shiny orange colour, others are a much duller shade of brown. Historically original coinage was often made of gold, partly for this very reason. Gold is a noble metal and the gold Doubloons, Florins, Ducats and Krugerrands were (and still are) precious partly because they are made of a metal which doesn't oxidise or tarnish.

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Experiments you can do at home

Welcome to Dr Hal's Backyard Science, experiments you can try at home. These are experiments that you can try in your garden or house with parental permission and supervision. Each of them comes with some health and safety instructions that an adult must read. The text is reproduced by kind permission of Education in Chemistry a journal of the Royal Society of Chemistry.

The Experiments:

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