## vera_ewing one year ago Why does a clear, saturated solution of PbI2 form a yellow precipitate when a small amount of KI is added to the solution? A. KI is insoluble in PbI2. B. PbI2 is always insoluble in water. C. Adding KI is like adding I-, which drives the reaction toward the formation of PbI2. D. Adding KI is like adding I-, which drives the reaction toward the formation of I-.

1. vera_ewing

A or B?

2. JFraser

neither

3. JFraser

remember that a saturated solution is a solution $$in \space equilibrium$$

4. vera_ewing

Oh so it's D?

5. UnkleRhaukus

i remember this reaction, two clear liquids make a extremely yellow coloured liquid

6. JFraser

is the $$I^{-1}$$ the precipitate?

7. vera_ewing

Yes?

8. UnkleRhaukus

ions don't precipitate

9. UnkleRhaukus

$\text{Pb}\text I_2$ is the yellow precipitate