1.3, 1.4 Diffusion, dilution, solution

Diffusion

Movement of molecules from an area of higher concentration to an area of lower concentration.

Why can diffusion not occur in solids?

The particles cannot move from place to place (only vibrate)

Explain diffusion when water is added to coloured solutions

The particles of colour move from their area of high concentration to an area of low concentration, mixing with the water molecules and causing the concentration to the colour to decrease

Solute

A substance that is dissolved in a solution.

Solvent

A liquid that a solute dissolves in

Solution

A mixture that forms when one substance dissolves another.

Soluble

If the new attractive forces are strong enough to overcome the old ones

what happens in a solution?

The attractive forces between particles of solute are broken

What is a saturated solution?

A solution that holds the maximum amount of solute that can dissolve in the solvent.