This video covers everything you need to know about filtration for GCSE — from the underlying principle to the practical setup and the vocabulary that examiners expect. You'll see why filter paper works, what residue and filtrate mean, and how pore size determines what can and cannot be separated, finishing with a look at the limitations that make other techniques necessary for dissolved substances.

What You Will Learn

00:16What filtration is and which type of mixture it is used to separate.

02:04What residue is and how to use the term correctly in exam answers.

02:32What filtrate is and how to use the term correctly in exam answers.

04:30How filter paper works and what pore size means in the context of particle separation.

05:00What equipment is used in a standard filtration setup and how to assemble it correctly.

05:24Why dissolved substances pass through filter paper and cannot be removed by filtration.

06:03How to describe and explain the filtration process in a step-by-step exam answer.

11:20How filtration is applied in real-world contexts such as removing bacteria from water.