SEPARATING MIXTURES

SEPARATING MIXTURES

1. There are two types of mixtures heterogeneous mixtures and homogeneous mixtures

2. MAGNETIC SEPARATION

   • We can use magnetic separation if we want to separate mixtures that consist of substances attracted by magnents and substances that not.

3. DECANTATION

   • Heavy sediments in liquids sink to the bottom of a container. When we decant a liquid, we pour off the liquid so that the sediment remains in the container.
     • Two liquids of different density can also be separated by deantation.

4. FILTRATION

   • Filtration separates much smaller particles from a liquid or gas. A filter is used to catch the particles, but allows the liquid to pass.

5. EVAPORATION

   • Solids which have been dissolved into a liquid can be separated using heat. The liquid turns into vapour and the remaining sdiment, can be collected.

6. DISTILLATION

   • When two liquids evaporate at a different rate, such as water and ethanol, the mixture ca be separated using distillation. The liquid is heated and as the ethanol has a lower boiling point that water, it evaporates firts and form vapour.
     • This vapouris then collected and cooled, resulting in pure ethanol.