Solutions and Suspensions

What is a Solution?

A solution is a mixture in which the constituents are evenly mixed.

solute

solvent

e.g.

sugar + water --> sugar solution

solute + solvent --> solution

Different Types of Solution

State of solvent

State of solute

Example of solutions

Solid Solid Brass

Liquid Solid Sugar solution

Liquid Alcoholic drinks

Gas Fizzy drinks

Gas Gas Air

Water as a Solvent

• Water is a common solvent as many substances dissolve in it

• However, some substances do not dissolve in water e.g. glue and paint.

What is Solubility?

Solubility is the

measure of the amount

of solute that can

dissolve in a

solvent.

Factors that affect solubility

• The nature of the solute

• The nature of the solvent

• Temperature

What is Rate of Dissolving? The rate of dissolving is a measure of

how fast a solute can dissolve completely in a solvent.

Factors that affect Rate of Dissolving

• Temperature• Rate of stirring

• Surface area of solute

Properties of Solutions

• Solute mix completely and evenly in solvent

• Light can pass through

• Filter paper cannot be used to separate solute from solvent

Common examples and uses

Solute Solvent Solution

Soap + Water = Soap water solution

Everyday use:Washing clothes

Common examples and uses

Solute Solvent Solution

Sugar + Water = Sugar syrup

Everyday use:Sweetening tea and coffee

What is a Suspension?

A suspension is formed when a solid does not dissolve in a liquid.

What are Suspensions

Suspensions are mixtures of small insoluble particles in a liquid or gas.

e.g. Flour water is a suspension.

How do we create a Suspension?

Insoluble substance

+ Solvent = Suspension

Sand + Water = Sandy water suspension

Properties of Suspensions

• Suspended particles do not mix completely and evenly

• Light cannot pass through

• Filter paper can be used to separate the suspended particles from the suspension