Bicarb rocket - Testing the bung is water tight PXL 20210815

Lockdown Chemistry School Experiments
Chemistry experiments you might be able to do at home under lockdown.
This short movie clip shows an example of testing the bung in the top of the plastic bottle to make sure it is water tight and hopefully airtight under pressure.
This is the critical part of the rocket to ensure a successful take-off. If the bung leaks all you will get is a launchpad failure.
Have fun with chemistry experiments at home when you can, even under lockdown.
Thanks to Jonathan Barton, Bob Worley and Abdul Khan for inspiration and encouragement.