This is a fantastic experiment. I have used it to reinforce a variety of different topics; decompostion, oxidation and rock cycles (clutching at straws?)

The Ammonium Dicromate contains the oxidiser.The decomposition is exothermic and proceeds as follows:

(NH4)2Cr2O7(s) -------> Cr2O3(s) + N2(g) + 4 H2O(g)

If you have any other ideas or comments regarding this reaction please email me and I will add them here.

Preparation Time                5 Mins

Difficulty                            5/10

WOW! Factor                    6/10


Volcano Experiment