Saturated, Unsaturated & Supersaturated

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 tothe 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

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 on the curve represents the region in which the solution is ________________________.

• On the solubility curve for a solution, any point above the curve represents the region in which the solution is ____________________________________________.

unsaturated

exactly saturated

saturated with the excess solute undissolved

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.

• If a tiny amount of solute is dropped into a supersaturated solution, then _____________________________________________________________________________.

the “extra” solute will immediatelyprecipitate out of solution

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

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

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