Making a Ocean acidification (pH) indicator
This experiment uses the natural properties of the humble red cabbage as a magic pH indicator. You can use it to test out the acidity of seawater (or any liquids) at home!
The magic of red cabbage
Red cabbage contains pigments called anthocyanins. Anthocyanins are a group of pigments that change colour based on the pH of their environment, so using the juice of red cabbage we can transform the colour of any liquid based on its pH! Let’s get stuck in!
Written by Juliet Maxted, Zoology graduate & Booth Museum volunteer
Find out more in Climate Conversations a Royal Pavilion & Museums blog series on Climate Change and what we can do about it.