Name: Oxygen content of air using red phosphorus @bobworley7974
Uploaded: 2024-09-18T01:29:31-0400
Duration: 8 min 17 s
Description: This demonstration used to be carried out with white phosphorus. It is no longer available as it is difficult to transport and store. Red phosphorus is a more stable allotrope of the element and can be used if Ignited with a hot glass rod.

Activity series of metals as EMF @bobworley7974

Uploaded June 2023 | Updated September 2026, 2 weeks ago

Here is a simple method of seeing how the nature of different electrodes affects the generated EMF. I can even do this with lithium, sodium, and calcium (not shown). The chemical concepts in school usually follow rates of reaction (eg, metals with water), but this method looks at energy. differences between different metals

effect of an electrostatic field on a puddle of water

Lead chloride precipitation on thermochromic plastic with lithium chloride

RSC Microscale chemistry triumph video with music 1

The small-scale decomposition of ammonium dichromate(VI)

Oxygen content of air using red phosphorus