# How much precipitation occurs for a given ionic product?

Let us say we have a salt AB in water. Suppose the ionic product exceeds the solubility product at a particular temperature. Now, I know that the ions will precipitate out of the solution. My doubt is, how much of the ions will precipitate? By saying "precipitation starts", do we mean that all the ions will precipitate, or will some ions remain in the solution?

• Some ions will remain. The solubility product will tell you how much exactly is that "some". Nov 13 '15 at 14:01