Science Form 2 Chapter 5 (5.2)

FORM 2 1
Science

Chapter 5
Water and solution

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5.2 Solution and solubility

Solute: Dissolves in Solvent:

A substance that soluble or A liquid that dissolve a
dissolve in a solvent substance (solute)

to form

Solution: 23

.

A mixture of one or more solutes tlhat dt.issolved in solvent

A- SOLUTION

5.4 Solution and Solubility

1. What is a solution?

A solution is produced when a substance
dissolved in another substance.

•A solute is the
substance that dissolves.
•A solvent is the
substance that the solute
dissolves in.

Dilute solution, concentrated solution and saturated solution

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The factors that influence the solubility rate
of substances

Factor Description

Temperature The higher the temperature, the faster
of solvent the solute can dissolve in the solvent

Size of the The smaller the size of the solute, the
solutes faster it can dissolve in the solvent

Rate of Stirring The higher the rate of stirring, the higher
the rate of dissolving.

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B- SUSPENSION

5.4 Solution and Solubility

1. What is a suspension?
A suspension is a mixture containing insoluble
substances.

2. A suspension can be separated by filtration.

Examples : Muddy water, fruit juices, chocolate drink,
blood

C- COLLOID

5.4 Solution and Solubility

1. Colloid
A colloid is a mixture of two or more solutes
dispersed evenly in a solvent.

2. Examples:
Emulsion milk, yogurt an mayonnaise

DIFFERENCES OF
SOLUTION.

SUSPENSION AND
COLLOID





WATER AS A
SOLVENT

5.4 Solution and Solubility

Water is known as universal solvent due to its ability to
dissolve almost all substances.

Water acts as a medium in many chemical reactions in
our body.
Water dissolves and transports many substances in our
body such as digested food and waste products.
Water dissolves cleaning agents such as soap powder,
dishwasher liquid and toilet cleaner.

Organic solvent

Organic Substances that Uses
solvent can be dissolves

Ether Oils, fats, grease to make cosmetics such as
lipstick and nail polish

Turpentine Grease, paint, tar to dilute paint to make it
easier to use

Chloroform Plastic to stick plastic
substances

Benzene Rubber, grease to stick rubber sheets

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