# Solubility Section 7.1. Solubility  When we dissolve a solute in water, there is a point where no more will dissolve  Saturated solution - a solution.

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Solubility Section 7.1

Solubility  When we dissolve a solute in water, there is a point where no more will dissolve  Saturated solution - a solution containing the maximum quantity of a solute at specific temperature and pressure conditions  look for the presence of undissolved solids in the solution  Solubility – the concentration of a saturated solution of a solute at a specific temperature and pressure  Units for solubility are usually grams of solute per 100 mL of solvent (g/100mL)

 Unsaturated solution = a solution containing less than maximum quantity of a solute at specific temperature and pressure conditions  Supersaturated solution = a solution that contains more of the dissolved material than could be dissolved by the solvent under normal circumstances Other Important Terms

Solubility tables (pg. 324)  ionic compounds are listed as having either high or low solubility at SATP (25°C and 100 kPa)  anions paired with particular cations have either:  High solubility OR  Low solubility

Solubility Categories  High solubility = with a maximum concentration at SATP (standard ambient temperature and pressure) of greater than or equal to 0.1mol/L  Low solubility = with a maximum concentration at SATP of less than 0.1mol/L  Insoluble = a substance that has a negligible solubility at SATP

Solubility of Solids  Solubility of a solid changes with temperature  Higher solubility at higher temperatures  in industry, the solute is isolated from many solutions by evaporating the solvent  this increases the concentration of a solution and once it is greater than the solubility, the solute crystallizes (precipitates) out  Solubility Curve = a graph of solubility versus temperature

Solubility Curve of Solids (pg. 316)

Solubility of Gases  Gases have a higher solubility at lower temperatures  Think: Pop  glass of cola sitting in the refrigerator as compared to one sitting on the kitchen counter  Can of pop is also stored under pressure  Increased pressure = increased solubility

Homework  Worksheet: Solubility Curves & Solubility Tables

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