how do you know if a reaction forms a precipitate
Share. When two aqueous solutions of ionic compounds are mixed together, the resulting reaction may produce a solid precipitate. This guide will show how to use the solubility rules for inorganic compounds to predict whether or not the product will remain in solution or form a precipitate.Aqueous solutions of ionic compounds are comprised of the ions making up the compound dissociated in water.he finished reaction is: 2 KCl(aq) + Pb(NO 3) 2 (aq) â 2 KNO 3 (aq) + PbCl 2 (s). The solubility rules are a useful guideline to predict whether a compound will dissolve or form a precipitate.