30/09/99 Solubility curves http://www.chalkbored.com/lessons/chemistry-11.htm

Notes on how to read the graph 30/09/99 Notes on how to read the graph The curve shows the # of grams of solute in a saturated solution containing 100 mL or 100 g of water at a certain temperature.

Any amount of solute below the line = unsaturated 30/09/99 Any amount of solute below the line = unsaturated Any amount of solute on the line = saturated Any amount of solute above the line = supersaturated.

30/09/99 Practice – label the following amounts of solute as saturated, unsaturated or supersaturated 1. 120g of KI in water at 50◦C? 2. 40g of NH3 in water at 30◦C? 3. 80g of NH4Cl in water at 10◦C unsaturated saturated supersaturated

KI, NaNO3, KNO3, HH4CL, KCl, NaCl, KClO3 30/09/99 Solutes whose curves move upward w/ increased temperature are typically solids because the solubility of solids increases with increased temperature. Solutes whose curves move downward with increased temperature are typically gases because the solubility of gases decreases with increased temperature. KI, NaNO3, KNO3, HH4CL, KCl, NaCl, KClO3 NH3, Ce2(SO4)3