Quantitative Chemistry
Quantitative chemistry is all about calculations using the mole as a unit. In maths, you expect to be doing calculations but in chemistry it can come as a bit of a shock to the system! Many students panic at the mention of carrying out chemical calculations but, with a little understanding and knowledge of certain ideas and a few techniques, they can become a lot less worrying. Calculations are a good way of picking up marks in the GCSE. Even when you don't get the answer right, you will always get credit for your working out - so always show how you arrived at your answer.
The key idea that lies behind quantitative chemistry is the mole. In the same way that you use the word a dozen to mean twelve of something and a couple to mean two of something, the mole simply means 6 x 1023 particles of matter. Those particles can be atoms, ions or molecules. This is extremely useful since particles of matter always combine in predictable and definite proportions e.g. one atom of calcium bonds to two atoms of chlorine.
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