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Any chemical that dissociates to give an H⁺ ion is classified as an acid.  There are stong and weak acids but at GCSE you only need to know some key reactions which apply to both weak and st...

The key to a good essay is planning ahead. Firstly look at the question and form the answer by putting down the main points, which will then become your paragraphs. Never put down more...

When looking at a poem for the first time it is important to make a note of a number of structural and linguistic points. Firstly, you may wish to look at the structure which can involve identifying th...

By definition an ideal gas in a closed follows the relationship of PV=nRT, or PV/T = constant

This means that Pressure * Volume/ Temperature will be the same at the start and end of the p...