Is it possible to predict a double displacement reaction between two ions in aqueous solution? I see how you can predict precipitation reactions if you know whether the product(s) is solluble, but that doesn't apply to all double displacement reactions.
If there is no precipitate, then there is nothing to drive the reaction. Both possible products would be soluble, and so there is no net reaction (it's just the reactant ions in solution).
Prediction, you say, is possible if you know the reactivity series like this for an elemtary level.