Is it an acid, base, or neutral? Make your own acid-base indicator from red cabbage, then test various household substances. Acids and bases are classes of materials that have different properties.

It demonstrates how substances like tea, red cabbage, and litmus paper react ... particularly focusing on bromothymol blue as an indicator, and discusses the concept of hydronium and hydroxide ...

Make an acid-base indicator. Dr Yan uses some very colourful science to find out what's acidic in his kitchen. Take 1/4 red cabbage. Finely slice the cabbage. Put all the chopped-up cabbage into a ...