Video: Decomposition of ammonium dichromate
Orange crystalline ammonium dichromate decomposes on heating to give the ‘fluffy’ green chromium(III) oxide. The reaction is non-stoichiometric but can be generally represented by the following equation.(NH4)2Cr2O7(s) ® Cr2O3(s) + N2(g) + 4 H2O(g)