In my lab, I'm trying to identify an unknown compound. So I did a solubility test of the unknown into 5% NaOH. According to the manual it said that if it appears insoluble,take the supernatant out and add 5% HCl until neutral. If percipitate or turbidity results, it means the unknown is an acid. So far I thought this: HA (unknown) + OH- <-> H20 + A- I'm assuming the conjugate base was in the supernatant, but I'm not sure. A- + HCl <-> Cl- + HA I'm not sure where the percipitate or turbidity is from. Please help me!