Overview: A demonstration-style video describing the synthesis of fuming nitric acid from potassium nitrate and sulfuric acid, including powder preparation, mixing, heating, and distillation, with observation of nitric acid vapor, yellow coloration from dissolved nitrogen dioxide, and toxic fumes; a byproduct potassium hydrogen sulfate is retained for potential reuse. It also reports an attempt to form nitrogen pentoxide by reacting the fuming nitric acid with phosphorus pentoxide, resulting in a viscous mixture and a nitrogen pentoxide product that can condense as a colorless, fuming liquid; tests with ethanol and cane sugar are attempted but not conclusive. The account emphasizes hazardous conditions, ventilation needs, and the presence of a solid that melts and refluxes around 40°C, illustrating the reactive and dangerous nature of the substances involved.
more