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This guide explains how to interpret solubility curves, which depict the grams of solute in a saturated solution at 100 mL or 100 g of water at various temperatures. Learn to categorize solute amounts into unsaturated, saturated, or supersaturated based on their position relative to the curve. Practice identifying the state of different solutes like KI, NH3, and NH4Cl at specific temperatures. Discover the behavior of solids and gases regarding temperature variations and solubility.
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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 • Any amount of solute on the line = saturated • Any amount of solute above the line = supersaturated.
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
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
