Скачать или смотреть How Filtration Works | GCSE Chemistry for Students & Teachers

💡 Struggling with separation techniques in GCSE Chemistry?
In this episode, I break down filtration step by step — from key terms like residue and filtrate to the essential lab equipment. Perfect for students revising and teachers looking for free resources.

Filtration is one of the most important separation techniques in chemistry — and it’s also something we encounter in daily life, from brewing coffee to cleaning pond water. In this episode of The Helpful Chemist, Dr Richard Willis (PhD Chemistry, Imperial College London) draws on over 15 years of classroom teaching experience to clearly explain the process of filtration, the key scientific terms, and how to use and label the laboratory apparatus.

You’ll learn:
• What filtration is and why chemists use it
• The essential equipment: beaker, filter funnel, filter paper, and conical flask
• The meaning of residue and filtrate
• Why pore size matters in filtration (and the trade-off between speed and clarity)
• Why filtration cannot separate dissolved substances or bacteria, and why filtered water isn’t always safe to drink

This episode is designed for GCSE chemistry students and is also a valuable teaching resource for chemistry teachers. To support your learning, don’t forget to download the free worksheet available on my Patreon page — perfect for revision and practice with exam-style questions.

Worksheet Link: https://www.patreon.com/posts/filtrat...

Join me as we break down chemistry step by step and make the subject clear, engaging, and accessible.

Chapters

0:00 Intro
0:17 What is filtration?
1:45 Key terms and basic procedure
3:05 How filtration works
4:35 Diagrams
5:25 Why pore size matters
7:00 Investigation
10:20 Microscopic analysis
11:30 Summary