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4dog

(531 posts)
1. So what is the HF used for in refining, and where does it end up?
Sat Jan 6, 2024, 10:59 PM
Jan 2024

Reminded me that in HS chemistry I got to perform an "experiment," in which, following instructions, I mixed some F salt with H2SO4 in a dish, which was covered with a small glass plate that had been coated with paraffin wax, with a design scribed in it. No hood in the classroom, so I put the assembly outside the casement window and left it overnight. The glass plate was etched, as expected. I don't recall, but the residues probably went down the sink.

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