The electrons surround the nucleus in 3 dimensions but it is easier to show an energy level model in two dimensions like the model that looks like a target. Image Oxygen Atom. ... (hydrochloric acid ...

In this practical you will compare the reactions of a carboxylic acid (ethanoic acid) with the reactions of hydrochloric acid. Back to top. Reaction 1: How to test the pH of carboxylic acid.