Find out how much Hydrochloric acid is needed to neutralise 25ml of Sodium Hydroxide solution.
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PLANNING Aim: Find out how much Hydrochloric acid is needed to neutralise 25ml of Sodium Hydroxide solution. Predictions: I predict that Hydrochloric acid and Sodium Hydroxide will give Sodium Chloride and Water. This is because an acid forms hydrogen ions (H+) when it is dissolved in water. An alkali forms hydroxide ions (OH-) when placed in water. Lets consider the ions in a Hydrochloric acid and Sodium Hydroxide molecule. A Hydrochloric acid molecule releases one H+ ion and one Cl- ion when placed in water. A Sodium Hydroxide molecule releases one Na+ ion and one OH- ion. This tells us that one molecule of NaOH and one molecule of HCl will neutralise each other and produce H2O as shown in the diagram above. Sodium Chloride is then formed. We have to take in note that to neutralise HCl and NaOH of the same concentration, equal amounts of each are needed. We can summarise this...

