Chemistry - Particle Theory: Acids

In this MEL Academy lesson your children will:

  • Prepare you own indicator
  • Investigate the range of different natural indicators
  • Carry out acidic patterns MEL Chemistry experiment

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 several DIY experiments. Prepare in advance household materials shown below.

DIY Materials

  4 x disposable cups
  Deionised water (or melted store bought ice)
  Red rose petal liquid, ~200 ml (made from boiling) AND/OR
  Red cabbage water, ~200ml (made from boiling)
  Citric acid or Vinegar
  Baking soda
  5ml measuring spoon or a small tea spoon
  Any 5 different fruit juices AND/OR
  Any 5 different coloured flowers (e.g.tulip) flower extract (made from boiling)
  5-6 glasses
  2 x Eggs
  2 x small rusty nails or screws


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 Acidic Patterns experiment from the Colorful Chemistry chemistry set:

Colorful Chemistry


This lesson is presented by Daniel Sullivan:

Daniel Sullivan

Daniel Sullivan is a hugely enthusiastic and experienced ex-head of science with over 20 years of teaching experience. He is now running a science teacher training company and is looking forward to engaging with students once again.