​Systems | Acid/bases | Solubility | Equilibrium)

Your students may find it interesting to compare the acid content of a low-acid apple juice or a low-acid orange juice to that in a regular juice of the same brand. These sample types could be added to an existing acid-base titration experiment, form the basis of a new experiment, or be used as project topics.

This is a favourite of the students. On the front cover, the pink colour in the test tube comes from cobalt(II) ions in water, Co(H2O)62+. The blue colour is the result of cobalt chloride complex ions (CoCl42–) in less dense acetone. This classic Le Châtelier’s Principle lab explores the reversible chemical reaction.