Question

How can I make a saturated solution of potassium iodide?

Answer 1

Well, get some of the salt....(which is rather expensive!)...

Explanation:

And add the salt to approx. `5-10*mL` of water UNTIL such time that there is undissolved solute.... As always, a saturated solution is a solution that contains the SAME amount of solute as would be in equilibrium with undissolved solute...

`KI(s) stackrel(H_2O) rightleftharpoonsK^+ + I^(-)`

When NO MORE solute dissolves, i.e. you can see crystals of `KI` after stirring, the supernatant solution in saturated with respect to `KI`. This site gives a solubility of approx. `1.5*g*mL^-1`... As always, `"saturation"`, and `"supersaturation"` refers to an equilibrium property.