READ SOLUBILITY CURVES HOW TO READ SOLUBILITY CURVES

What is Solubility? Solubility: the maximum amount of solute that will dissolve in a certain amount of solvent at a given temperature Solute = substance dissolved Solvent = does the dissolving Example: ___grams of salt (NaCl) dissolved in 100g of water at ___℃

Temperature and Solubility Temperature affects how much of the solute can be dissolved by the solvent. Solubility Curves: Are used to show how the solubility of a substance changes with temperature

Solubility Curve

Solubility Curve - Saturated Any point on a line represents a saturated solution In a saturated solution, the solvent contains the maximum amount of solute Example: At 90℃, 40g of NaCl in 100g H2O represent a saturated solution.

Solubility Curve - Unsaturated 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 90℃, 30g of NaCl in 100g of H2O represents an unsaturated solution.

Solubility Curve - Supersaturated Any point above a line represents a supersaturated solution. In a supersaturated solution, the solvent contains more than the maximum amount of solute. Example: At 90℃, 50g of NaCl in 100g H2O represents a supersaturated solution.

To read the graph: Find the line for the substance The amount that dissolves at a given temperature is on the y-axis

How much KNO3 dissolves in 100g H2O at 50℃ Find the line for KNO3 (red) Find the temperature and follow up to the line for KNO3 (green) Read across to the y-axis and this is the answer (blue) About 87g of KNO3 will dissolve