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2
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6
votes
2
answers
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Will a film of oil on water retard evaporation (of water) and prevent air and atmospheric impurities from diffusing into it?
I vaguely recall hearing that a layer of oil on water will slow down the evaporation of water, as well as serving as a barrier that would prevent (or retard) the diffusion of air and atmospheric ...
14
votes
3
answers
18k
views
Copper Chloride: neutralizing and disposal
I plan on etching some PCBs with hydrochloric acid and hydrogen peroxide, which will therefore produce some kind of copper chloride (green color) which is highly toxic if released into the ...
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