Saturated, Unsaturated & Supersaturated

1. Saturated, Unsaturated & Supersaturated

2. Saturated, Unsaturated & Supersaturated • A saturated solution is one in which no additional solute can dissolve in the solvent at that temperature. If more solute is stirred into a saturated solution, then the added solute will ____________________________ ____________________________________________. If a saturated solution is cooled, then the solution will most likely ____________________________________ ____________________________________________. • An unsaturated solution is one in which more solute can dissolve in the solvent at that temperature. If more solute is stirred into an unsaturated solution, the added solute will _______________________________ ____________________________________________. not dissolve and will settle to the bottom of the container precipitate the excess solute needed to bring the solution to its new saturation point dissolve completely or dissolve only in part if the solution becomes saturated

3. Saturated, Unsaturated & Supersaturated • On the solubility curve for a solution, any point under the curve represents a region in which the solution is ____________________. • On the solubility curve for a solution, any point found onthe curve represents the region in which the solution is ________________________. • On the solubility curve for a solution, any point abovethe curve represents the region in which the solution is ____________________________________________. unsaturated exactly saturated saturated with the excess solute undissolved

4. Saturated, Unsaturated & Supersaturated • A supersaturated solution is one in which the solvent “is holding” has more solute than it should at that temperature. • Supersaturated solutions are a rare occurrence. It is not easy to make supersaturated solutions. • Supersaturated solutions are created by making a saturated solution at a high temperature and then slowly cooling the mixture without any disturbance. • Ifatinyamountofsoluteisdroppedintoasupersaturated solution, then _________________________________ ____________________________________________. the “extra” solute will immediately precipitate out of solution

5. Saturated, Unsaturated & Supersaturated Ex.1) If 10.0 g of KCl is dissolved in 100.0 g of water at 20.0oC, then would the solution be described as unsaturated, saturated, or supersaturated? ________________________________________. Ex.2) If 10.0 g of KClO3 is stirred into 100.0 g of water at 20.0oC, then would the solution be described as unsaturated, saturated, or supersaturated? ________________________________________. Ex.3) If 10.0 g of KClO3 is dissolved in 100.0 g of water at 20.0oC, then would the solution be described as unsaturated, saturated, or supersaturated? ________________________________________. unsaturated saturated with about 1 g of undissolved KClO3 supersaturated

6. Saturated, Unsaturated & Supersaturated Ex.4) If 100.0 g of KI is stirred into 100.0 g of water at 20.0oC, then would the solution be described as unsaturated, saturated, or supersaturated? ______________________________________ Ex.5) If 100.0 g of KNO3 is stirred into 100.0 g of water at 60.0oC, then would the solution be described as unsaturated, saturated, or supersaturated? ______________________________________ Ex.6) How many grams of KNO3 will exactly saturate 200.0 g of H2O at 20.0oC? ______________ g unsaturated unsaturated ≈70