Chemistry
Explain the meaning of the term 'saturated solution'. State two methods to convert a saturated solution to an unsaturated solution.
Answer
A saturated solution is one which cannot dissolve more of the solute at a given temperature.
Two methods to convert a saturated solution to an unsaturated solution are:
- By heating the saturated solution slowly it can dissolve more of the solute at a higher temperature.
- By adding more solvent to the saturated solution. Increased amount of solvent can dissolve more of the solute at that temperature.
Related Questions
Give four examples of each of the above types of solutions i.e. true solution, colloidal solution & suspension. Give a reason why a true solution does not exhibit 'Tyndall effect'.
If 5 g. of a solute is added to 50 ml. of a solvent at a particular temperature and the solution can dissolve more of the solute at that temperature - is the solution obtained a saturated or an unsaturated solution. Give reasons.
State how a 'supersaturated' solution differs from a 'saturated solution'. State briefly how you would prepare a supersaturated solution using potassium chloride and water.
'The process of separation or deposition of crystals from a hot saturated solution on gentle cooling of the solution is called crystallisation'. With reference to the statement explain what is meant by 'water of crystallisation'. State which physical properties of a crystal are correlated with the water of crystallisation.