1.10 Solubility
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Solvent
A liquid in which the solute dissolves
Solute
Soluble substance which dissolves
Solution
A mixture of a solute dissolved in a solvent
Insoluble
A substance that will not dissolve in a particular solvent
Saturated solution
A solution in which no more solid will dissolved at a particular temperature
What happens when a saturated solution is heated then cooled?
Some of the solute will be deposited
Solubility
The mass of solid that will saturate 100g water/solvent at a particular temperature
Calculation for solubility
Mass of solute/ mass of solvent x 100
What happens to solids’ solubility when temperature is increased?
Solubility also increases
What happens to gases’ solubility when temperature is increased?
Solubility decreases
How do you draw a solubility graph?
Temperature on x axis (oC), solubility on y axis (g/100g), draw a curved line to connect the points
EXPERIMENT how do you determine the solubility of a solid?
• 10cm3 of water in boiling tube • Add sodium chloride and stir until excess is present • Decant saturated solution into a weighed evaporating basin • Weigh basin with solution inside • Evaporate until it starts to spit • Complete drying over water bath. To ensure drying is complete, heat and weigh until there is no change in mass. By finding the solute and solvent mass using these results we can figure out the solubility of the solid