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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...

Le Chatelier's principle is commonly known as the quilibrium law and it is useful in order to be able to analyse reversible reactions and how changing the conditions will affect which way the reaction ...

The periodic table arranges all the different elements into columns and rows, The horizontal rows are called periods, this is where the elements differ from left to right but the addition of an electro...