Image for Exploring what gases make up the air around us

Exploring what gases make up the air around us

Duration: 06:46

Dr Peter Wothers performs a series of chemistry experiments in his laboratory at the University of Cambridge’s Department of Chemistry. The theme is one of the ancient alchemical elements, ‘Air’. He invites three Key Stage 3 students to his laboratory to help him. They begin by exploring the gases that make up the air around us. Next they measure the density of carbon dioxide. The team then extract carbon dioxide from calcium carbonate and create ‘dry ice’. Finally they explore how limewater is made.

Available since: Mon 18 Mar 2013

This clip is from

The Alchemist's Apprentices

Dr Peter Wothers explores the four ancient elements: water, earth, air and fire.

First broadcast: 22 Mar 2013

Image for The Alchemist's Apprentices Not currently available on BBC iPlayer

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.