What happens when two aqueous solutions are combined in a precipitation reaction and no precipitate is formed?

A. The solutions have been neutralized

B. There's no reaction

C. A solubility reaction has taken place

D. An acid-base reaction has taken place

The answer is C. A solubility reaction has taken place. When no precipitation is formed, this means that the aqueous solution is soluble, The key to predicting a precipitate is to learn the solubility rules or common ionic solids : If the ion is soluble, then it remains in its aqueous ion form. If all the ions in a reaction are shown to be soluble, then no precipitation reaction will take place.