51ºÚÁÏ

Description:
A hands-on, engaging lesson where pupils test how toothpaste behaves in a neutralisation reaction. Designed for KS4 Special Needs pupils studying Entry Pathways Unit 6205: Making Chemical Compounds, this practical can also be used in mainstream KS3/KS4 classes to reinforce the relevance of acids, alkalis, and indicators in everyday products.

Lesson Overview:

Starter: Pupils discuss why we use toothpaste and how it relates to acids and alkalis.

Main Practical Task: Pupils carry out a step-by-step investigation using universal indicator to test the pH of different toothpaste samples mixed with water, and then with acid. They record observations and pH values using a spotting tile.

Conclusion Task: Pupils write which toothpaste was the best and explain why, linking to the neutralisation reaction.

Plenary: Pupils reflect on WILFS/success criteria and discuss how they can improve next time.

Equipment Needed (per group):

3 test tubes

Stirring rod

1 pipette

Spotting tile

Universal indicator

Safety goggles

Small amount of water

Pea-sized amount of toothpaste x 3

Small amount of acid (e.g. dilute hydrochloric acid)

Includes:

Structured PowerPoint with clear WALT/WILF

Full equipment and method instructions

Conclusion prompt

Ideal For:

KS3 and KS4 Science

SEN/ALN learners and Entry Level Science

Acids and alkalis practical application

Supporting scientific enquiry and lab safety skills

Perfect for introducing real-world chemistry in a simple, practical way.