1. Solubility curves

2. Solubility Curves solubility of a solute changes with temperature solubility of each compound is different at different temperatures solubility of each compound changes in a different way as temperature changes

3. UNSATURATED, SATURATED AND SUPERSATURATED SOLUTIONS 1.UNSATURATED SOLUTION more solute can be dissolved while the temperature remains constant *any point in the region under the solute ’ s solubility curve 2. SATURATED SOLUTION no more solute can be dissolved into the solution at a fixed temperature * any point ON the solubility curve 3. SUPERSATURATED SOLUTION solution containing more dissolved solute than normal at a particular temperature unstable may suddenly form solid crystals leaving only a saturated solution behind * any point ABOVE the solubility curve

5. Calculations using solubility curves Using The Graph On the Previous Slide 1. Is the solution saturated, unsaturated or supersaturated if there are 20g of KClO 3 at 30°C 2. Is the solution saturated, unsaturated or supersaturated if there are 5g of KClO 3 at 50°C 3. Is the solution saturated, unsaturated or supersaturated if there are 20g of KClO 3 at 50°C 4. 100 g H 2 O is saturated with KClO 3 at 100°C. How much KClO 3 will come out of solution if the temperature is decreased to 48°C? 57 g-18 g = 39 g Saturated Unsaturated Supersaturated