Volcano Experiment two drops of acetone is added to the bright orange Ammonium dichromate, (NH4)2Cr2O7 and ignited. It locks like a volcano in action. The reactions if exothermic. The products formed are Chromium (III) oxide, nitrogen gas and steam. (NH4)2Cr2O7(s) â Cr2O3(s) + N2(g) + 4H2O(g) Se...