Solubility Curves The amount of a solute that will dissolve is a solvent depends upon the temperature of the solution.

KNO 3 dissolved in water The data to the right is how many grams of KNO 3 solid that will dissolve in 100ml of water at different temperatures.The data to the right is how many grams of KNO 3 solid that will dissolve in 100ml of water at different temperatures. TemperatureMass 0 o C15g 10 o C23g 20 o C34g 30 o C47g 38 o C60g

KNO 3 dissolved in water This graphs shows the relationship between how much solid potassium nitrate will dissolve in water at different temperatures. Notice how it is not a straight line, but curves upward. The hotter the water, the more potassium nitrate will dissolve.

Question? How much Potassium Nitrate will dissolve at 25 degrees Celsius? Follow the line up from 25 degrees and then over to the mass.

Solubility Curve of NH 3 Notice how the curve is different from the solid potassium nitrate. The reason is simple, ammonia (NH 3 ) is a gas. Therefore it is less soluble in hot water.

Saturated Solution Any point on the line indicates a saturated solution. Saturated means the solvent has dissolved as much solute as possible.

Unsaturated Solution The red area ofThe red area of the graph the graph represents an represents an unsaturated unsaturated solution. Less solution. Less solute is dissolved solute is dissolved than a saturated than a saturated solution. solution.

Supersaturated Solution The red area ofThe red area of the graph the graph represents a represents a supersaturated supersaturated solution. More solution. More solute is dissolved solute is dissolved than a saturated than a saturated solution. solution.

Use this graph to help you answer the rest of the questions.