Science Memes

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submitted 2 weeks ago* (last edited 2 weeks ago) by [email protected] to c/[email protected]

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[–] [email protected] 49 points 2 weeks ago (3 children)

distilled water, lab grade ethanol, a couple drops of limonene, and there you go

[–] [email protected] 32 points 2 weeks ago (1 children)

Sadly the Erlenmeyer flask was previously used for some nasty water soluble compounds and just looks clean.

[–] [email protected] 21 points 2 weeks ago (1 children)

rinse -> acetic acid -> rinse -> Acqua regia-> Rinse -> Pirahna solution -> Rinse -> 500°C oven -> Rinse

I would then drink from it without even worrying

[–] [email protected] 10 points 2 weeks ago (2 children)

Is NileRed then too cautious when he only uses fresh breakers for stuff he is going to eat?

[–] [email protected] 13 points 2 weeks ago (1 children)

The cost of a fresh beaker is worth mitigating the risk.

[–] [email protected] 3 points 2 weeks ago

That could be argued, but where does it stop? New stir bars? New thermometer probe every time?

[–] [email protected] 9 points 2 weeks ago

he's lucky to have a big enough channel to be able to afford 40000$ NMR machines, so a couple beakers aren't that much of an expense for much more safety

but as a home chemist, there is NO WAY I'm getting new beakers every time I wanna do edible chem, especially pyrex branded ones like Nile does. Lab equipment, even basic glassware, is ridiculously overpriced

[–] [email protected] 16 points 2 weeks ago (1 children)

Don't forget the phase-change cooling from the addition of solid state H20.

[–] [email protected] 7 points 2 weeks ago (1 children)

H2O, not H20.

[–] [email protected] 19 points 2 weeks ago

No, they're talking about a ridiculously high mass isotope of Hydrogen. Turns out it has some wacky properties.

[–] [email protected] 1 points 2 weeks ago (1 children)

lab grade ethanol

That's usually methylated spirit. It probably won't kill you, but you'll lose your vision.

[–] [email protected] 4 points 2 weeks ago (1 children)

methylated spirits are the ones used for cleaning, lab grade ethanol needs to be just ethanol or some reactions might fail, however in some badly managed labs you might find mislabeled stuff and have contaminants

still, you shouldn't drink it anyways, as some producers use the highly carcinogenic benzene to make pure 100% ethanol, as distillation with water can only get you up to the 95,6% azeotrope, and some benzene might make it's way in the product

[–] [email protected] 2 points 2 weeks ago

I see. I've only used ethanol for disinfection, and it was always methylated.