a) A school with hydrogen gas?!?!?! God, no wonder why Sweden is the country with the highest human development index!!!!!
b) Hydrochloric acid + aluminium. Both affordable substances which give utterly cool -and potentially dangerous- experiments.
There are plenty of videos and different experiments, but this was the first I got. I'm tired and wanna go to bed
Basically it's 6 HCl + 2 Al --> 2 AlCl3 + 3 H2. Which is cool, since aluminium trichloride is a very interesting and important catalyst, and hydrogen is... well, hydrogen
I was just finishing uploading my MX/hurts Like Heaven/Yellow/In My Place video to Youtube. I'm hoping they don't block it to me, it's 14:52 long so I should be fine with their 15 minutes curfew, but you never know...
HCl is really easy to find. You might even have some of it lying around the house, it's widely used for thorougly cleaning bathrooms and kitchens. If you don't have any at home, check out your nearest hardware shop or chemist, and ask for "diluted muriatic acid". You should get something like this:
