Name: Glittering oil drop @bobworley7974
Uploaded: 2020-05-20T01:29:31-0400
Duration: 8 min 17 s
Description: The oil drop experiment is improved by the use of glitter n place of lycopodium powder, talc or flowers of sulfur. Biodegradable glitters are avilable. Can be done on a vizualiser and displayed to the class.

The small-scale decomposition of ammonium dichromate(VI) @bobworley7974

Uploaded January 2023 | Updated September 2026, 2 weeks ago

Safety and environmental issues have curtailed the large scale versions but here is a contained version which should still be carried out in a fume cupboard. The surprise was that I could then investigate it quantitively.

The small-scale decomposition of ammonium dichromate(VI)

Oxygen content of air using red phosphorus

Seven reactions of silver ions in a puddle

Movement of copper ions in ammonia solution

Electrolysis of copper sulfate with fibre electrodes