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Energy conversion in a neutralisation reaction Aim We are trying to find out what factors affect the energy conversion in a neutralisation reaction. Variables The variables that can be changed are Concentration of acid Type of Acid Concentration of alkali We choose type of acid Prediction I predict that if the acid is stronger (has a lower pH) than more heat will be given out in the endothermic reaction. Theory Strong and Weak Acids- Acid is an H+donor and a consequence of this is that, in aqueous solutions, acid donates H+ to water molecules to produce oxonium ions H3O+. The presence of oxonium ions gives rise to the familiar acidic properties of all aqueous solutions of acids. Acids vary in strength. Different acids donate H+ to differing extents. Strong acids have a strong tendency to donate H+: the donation of H+ is essentially complete. The reaction with water can be regarded as going to completion and can be described by the following equation,...

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