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Solubility curve

Saturated. Solubility curve. Supersaturated. Unsaturated. Solubility curve. Any point on a line represents a saturated solution. In a saturated solution, the solvent contains the maximum amount of solute. Example At 90 o C, 40 g of NaCl(s) in 100g H 2 O(l) represent a saturated solution.

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Solubility curve

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  1. Saturated Solubility curve Supersaturated Unsaturated

  2. Solubility curve • Any point on a line represents a saturated solution. • In a saturated solution, the solvent contains the maximum amount of solute. • Example • At 90oC, 40 g of NaCl(s) in 100g H2O(l) represent a saturated solution.

  3. Solubility curve • Any point below a line represents an unsaturated solution. • In an unsaturated solution, the solvent contains less than the maximum amount of solute. • Example • At 90oC, 30 g of NaCl(s) in 100g H2O(l) represent an unsaturated solution. 10 g of NaCl(s) have to be added to make the solution saturated.

  4. Solubility curve • Any point above a line represents a supersaturated solution. • In a supersaturated solution, the solvent contains more than the maximum amount of solute. A supersaturated solution is very unstable and the amount in excess can precipitate or crystallize. • Example • At 90oC, 50 g of NaCl(s) in 100g H2O(l) represent a supersaturated solution. Eventually, 10 g of NaCl(s) will precipitate.

  5. Solubility curve Any solution can be made saturated, unsaturated, or supersaturated by changing the temperature.

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