Factors affecting the rate of a reaction. You will explain the effect of three factors on the rate of a general chemical reaction: Temperature EITHER Concentration OR Pressure OR Surface area Catalysis Your explanations should refer to the relevant theoretical models (collision theory, Maxwell-Boltzmann distribution), referenced appropriately. The best reports will include diagrams where relevant, including references for any diagrams which are copied from books or the internet. You should state how changing the given condition affects the rate of a reaction, as well as why.