Page 24 - Ranger PT3 2022 science

Science PT3 Chapter 5 Water and Solution
Applications of Evaporation of Water in Daily Life

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Drying seafood like prawns, Wet clothes are hung under Hot air from the hair dryer
fish and squids. the Sun to dry. dries the wet hair.

5.2 Solution and Rate of Solubility

Solute, solvent and solution

Solute (Salt) Solvent (Water) Solution (Salt solution)
Substance that Liquid that dissolves a Mixture formed when a solute
dissolves in liquid. substance. dissolves in a solvent.
Diagram 5.5

1. Table 5.1 shows different solutions.
Table 5.1 Types of solution
Dilute solution Concentrated solution Saturated solution
• Contains a little solute. • Contains a large quantity of • Contains the maximum Form 2
• Can dissolve much more solutes. amount of solutes.
Form 2
particles of solutes. • Can dissolve only a little bit • Cannot dissolve any more
more particles of solutes. particles of solutes.

Solution and Suspension
Table 5.2 Difference between solution and suspension
Solution Suspension

• A clear mixture forms when the solute • A cloudy mixture forms when the solute
dissolves in the solvent. particles do not dissolve in the solvent.
• Has uniform colour. • The size of the suspension particles is too
• Light is able to pass through the solution big that it prevents the light from passing
because of the tiny size of the solutes. through the suspension.
• The solution does not leave any residue when • When left aside, it will form sediment at
filtered. the bottom of the container or float on the
surface of the solvent and leave residue
when filtered.

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