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Exothermic Neutralisation Reaction. Introduction. The aim of this investigation is to try to find out how concentration can effect an exothermic neutralisation reaction. I will be reacting sodium hydroxide with hydrochloric acid, which neutralises to form sodium chloride a salt with water. Sodium hydroxide is an alkali and hydrochloric acid in an acid so therefore when reacted together neutralisation occurs. In this case when both substances are reacted, thermal energy is produced hence an exothermic reaction as thermal energy is radiated out. The reaction will look like this: NaOH + HCl H2O + NaCl The factors that might affect the results of this experiment are: 1. Volume 2. Concentration 3. Type of substance used. 4. Catalyst 5. Pressure Volume can affect the experiment because if it is not kept constant them results will be varied and there would be no proof that concentration can effect this exothermic neutralisation reaction, as the test would not be fair. Also if substances used were different...

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