Question: what happens if you mix oxygen and hydrogen

Roisin Jones answered on 13 Nov 2016:

In general, you have the set up for quite a big explosion, as hydrogen gas is extremely flammable, and oxygen supports combustion! There was actually a fairly severe accident involving oxygen and hydrogen gas in the University of Hawaii this year, where a spark from a pressure gauge ignited the gases (which are both very flammable) and caused a big explosion, which seriously injured the researcher who was working with them, so you have to be REALLY careful if you’re working with a mixture of these gases.