#GCSE #Chemistry setting up a couple of Kipps apparatus. One to make hydrogen and the other to take apart and explain how it works to the students - Such a cool piece of equipment #STEM #Science #iteachchemistry
To Make Hydrogen, Acid is poured in the top and it makes its way through a tube to the bottom tank which gradually fills up. The middle tank has some zinc metal in it which will react with the acid to form hydrogen and will come out of the middle gas tap as the acid enters the middle tank and reacts with the acid. Now the clever bit. When the gas tap is turned off the pressure increases, the acid is pushed down into the bottom tank and up into the top tank. No acid touches the zinc so the reaction stops. When you need more hydrogen the gas tap is opened, releasing the pressure and the acid level rises again and touches the zinc and the reaction starts all over again.
The Kipps apparatus is very versatile making several different gases, not not used much as it is more convenient to buy a cylinder. Now this may be true but nothing like so cool.
