Aim # 17: What are unsaturated, saturated, and supersaturated solutions? H.W. # 17 Read p. 472 (sec. 15.2) Study class notes Complete handout sheet Do Now: A polar solvent will dissolve a polar solute. Which of the following gases should have a significant solubility in water? a) N2 b) HCl c) O2 d) HCN e) NH3

I Saturated Solution- a solution that has as much solute as it can hold under existing conditions (temp. and amt. of solvent). Dynamic Equilibrium exists- rate of dissolution=rate of crystallization

II Unsaturated Solution- a solution that contains less solute than it can hold at a given temperature. III Supersaturated Solution- a solution that contains more solute than it normally holds at a given temperature.

IV Dilute Solution- a solution that contains a small amount of solute compared to the amount of solvent. V Concentrated Solution- a solution that contains a large amount of solute compared to the amount of solvent.

Table G Solubility Curves

22 g KClO3 = x g KClO3 100 g H2O 200 g H2O x = 44 g KClO3 VI Solving solubility problems- 1. What mass of KClO3 can be dissolved in 200 g H2O at 500C? 22 g KClO3 = x g KClO3 100 g H2O 200 g H2O x = 44 g KClO3 2. If the temperature is raised to 800C, what mass of KClO3 would have to be added to form a saturated solution once again? 88g – 44g = 44g KClO3

At 660C, solubility KClO3 = 33g KClO3 100 g H20 = 66 g KClO3/200g 3. If the solution is now cooled to 660C, approximately how much KClO3 would precipitate from the solution? At 660C, solubility KClO3 = 33g KClO3 100 g H20 = 66 g KClO3/200g you would precipitate 88 g -66 g = 22g KClO3