Filtration is a separation technique used to separate insoluble substances from liquids or solutions.

  • An insoluble solid is a solid substance that does not dissolve in a solvent. For example, sand is an insoluble substance.

An example of filtration in everyday life is passing hot water through ground coffee and a filter. In this case, the liquid coffee is the filtrate and the insoluble parts of the coffee are filtered out.

To carry out a filtration, you will need:

  • Conical flask
  • Funnel
  • Filter Paper

As shown in the diagram above, a filter funnel and paper are used.

1. Pour a mixture into the filter funnel.

2. The solid particles are too large to pass through the filter paper, so it stays behind.

3. The liquid or solution passes the filter into the conical flask, which is called the filtrate.