Here’s another video that might come in useful when teaching about acids and alkalis – Rosie Coates shows us her favourite chemistry demonstration involving a giant test-tube and some universal indicator solution. As well as showing us a fantastic demo, Rosie explains how the science of acids and alkalis can have important real-world applications. This is another video where it’s really worth hitting the “HQ” button on the youtube player after you’ve hit “play”.
I love teaching about acids and alkalis at KS3 because there’s quite a bit of fun practical work you can do – making an indicator out of red cabbage is an activity that Year 7 always seem to love. The textbook way of starting this topic is to talk about about acids and alkalis around the house… but this might be far more dramatic / interesting way to introduce the subject: The clip is from Smalltalk Diaries, a series of ten short shows about the lives of minibeasts.