As part of our topic on acids and bases, we made an indicator from red cabbage. An indicator is a chemical that is a different colour in acid or base. We then used our indicator to determine whether household substances, like shampoo and conditioner, were acidic or basic. Lemon juice was the most acidic substance tested turning a red pink colour and bicarb soda was the most basic, turning blue. We then linked the colour change to pH, a scale that measures acidity.

Merridy Manuel

Science Teacher