Using some common household items, we'll show you how you can test to see if something is an acid or a base. This chemistry experiment must only be carried out with permission and under supervision of an adult.

You will need: safety glasses and gloves, red cabbage, tomato sauce, bleach, vinegar, fizzy juice, water, a bowl, and some clear containers. It's most likely to appeal to over 13s. View on YouTube.

Our friends over at the Royal Society of Chemistry (RSC) have some great resources to accompany this video. Head over and check them out:

If you don't have a red cabbage - please don't rush out to try buy one - you can experiment online without the mess in this virtual pH scale simulator.

We also recommend this really good infographic from Compound Interest that'll let you compare colour changes with an indicator chart.

For teachers in particular, you may find the following RSC resources useful for the classroom (SSERC risk assessed):

• Making a pH indicator.
• Red cabbage pH indicator.