A solution contains 1.41 x 10-2 M potassium sulfite and 1.50 x 10-2 M sodium chromate. Solid...

Question:

Selective Precipitation:

An insoluble salt compound can be created as a product in a precipitation reaction system. One possible set up involves adding a solid salt compound to an aqueous solution of a different salt compound, in which these two compounds contain certain constituent ions that will pair up to form the insoluble product. The product will precipitate when the solubility product of its constituent ion molarity values exceeds its {eq}\rm K_{sp} {/eq} value. In selective precipitation the added salt compound contains a common ion that will form multiple different insoluble salt compound products in the resulting solution. Therefore, these products share a certain constituent ion. Their {eq}\rm K_{sp} {/eq} values are usually different enough that the products will begin to precipitate at different times.

Answer and Explanation: 1