Yes, you can do a dilution series using the formula. It is simply creating about 4 different solutions of varying concentrations of a substance in a volumetric flask. The easiest solute to use would be with Cu 2+, usually in the form of CuSO4. This is because (as you already would know) it has a distinct blue colour that makes it far easier for your observations. You results would thus entail a difference in colour. The experiment just involves you to take about 10 ml of the initial solution that you have prepared using the formula C= n/v and then placing it in another volumetric flask and filling it up with water until the mark and then determining the concentration with C1V1=C2V2