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The best way to improve your exam technique is to do past papers under timed conditions. Be strict with yourself and treat it like an actual exam. Then mark your own paper using the official mark schem...

In simple terms, we need to know whether a reactant is first, second or zero order if we want to understand what effect changing the concentration of that reactant has on the rate of the reaction.

1. A substitution reaction is a displacement reaction. This is when one functional group in one reactant is displaced by another functional group from a second reactant.This is different to an addition...

Down a group of the periodic table, the atomic radius increases.
As we go down a group, the outermost electron of an atom is placed in a shell that is further from the nucleus. This means it experien...

A buffer is a solution which resists changes in pH when alkaline or acidic solution is added to it.

Buffers are created based on the equilibrium of a proton donor/ acceptor...