Chemistry - Filtration

In this MEL Academy lesson your child will:

  • learn the nature of filtration
  • make homemade carbon-filter with their own hands
  • assemble ion-exchange resin filter

Lesson time

11:00am   PST (San Francisco, Seattle, ...)
12:00pm   MST (Phoenix, Denver, ...)
1:00pm   CST (Chicago, Houston, ...)
2:00pm   EST (New York, Toronto, ...)
7:00pm   GMT (London, ...)

Lesson duration: 45-55 minutes.

Prepare in advance

In this lesson, we will conduct "Homemade filter" DIY experiments. Prepare in advance household materials shown below.

DIY Materials

  2x empty plastic bottle (ideally 1ltr)
  cotton wool (handful)
  clean sand (handful)
  small round pebbles or marbles (1-2 cm in diameter), optional
  BBQ or active charcoal powder (crush and sieve in advance!)
  plastic funnel
  coffee filter paper or kitchen towel 2-3 pcs
  2x teabag
  coffee powder (not instant!), optional
  mud, 1-2 tablespoons
  pot with water
  hot tap water
  3x glass


Please, download and print this worksheet in advance. You’ll need to refer to it during the lesson.

MEL Experiment

If you are a subscriber of MEL Chemistry then you can conduct Ion-exchange resin from the Pure Water chemistry set:

Pure water


This lesson is presented by Mark Maclaine:

Mark Maclaine

Mark has been an educator for 20 years and has taught more than 20,000 hours of one-on-one lessons to over 1200 students. He initially struggled in school as the academic study didn’t come naturally to him. What was a weakness has become one of his greatest strengths - finding he is able to connect with students who are themselves struggling. Using a set of skills developed over the past two decades and his RELATE Teaching Method, Mark has become one of the best-known educators in the world. He is passionate about his work and is committed to transforming the education system so it works for everyone.