How do solubility rules help us identify which product is the solid?
I am not quite sure what you are after......
There are general rules for assessing solubilities in aqueous solution:
All the salts of the alkali metals and ammonium are soluble.
All nitrates, and perchlorates are soluble.
All halides are soluble EXCEPT for
All sulfates are soluble EXCEPT for
All carbonates and hydroxides are insoluble. All sulfides are insoluble.
The given rules follow a hierarchy. Alkali metal and ammonium salts tend to be soluble in all circumstances. The one exception to this rule is