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How much silver powder (by mass) is in this beaker? (infosec.pub)

submitted 3 days ago by LostXOR@fedia.io to c/asklemmy@lemmy.world

43 comments fedilink hide all child comments

I'll be drying the silver out and weighing it sometime in the next couple days. Closest guess when I do gets bragging rights! (And absolutely nothing else)

The scale was zeroed with the beaker empty, and it contains only water and silver (and a trace amount of copper nitrate). If you have a strategy behind your guess, please do share it!

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[–] jjagaimo@sh.itjust.works 54 points 3 days ago* (last edited 3 days ago) (4 children)

Density of silver: 10.49g/mL
Density of water: 1g/mL

Total mass: 1464g
Total volume: 700mL

x = volume of silver, mL
y = volume of water, mL

10.49x + 1y = 1464
x+y = 700

9.49x=764
x=80.5058mL of silver

10.49x = 
10.49 × 80.5058 =

844.51g of silver

Probably an over estimate [of just the silver] due to the copper so probably more like 835-840g. [If just evaporating, the mass would be higher due to the lower density of the impurities like copper sulfate, so more around 845-850g. E.g. 5mL of copper sulfate would be 830g of silver and 18g copper sulfate = 848g]

[–] dfyx@lemmy.helios42.de 24 points 3 days ago (1 children)

Damn, you were faster than I was, I was just calculating the same thing. All I have left is to assume that they won't be able to fully dry the silver and guess a bit higher... 850g.

[–] LostXOR@fedia.io 9 points 3 days ago (1 children)

Unfortunately for you, I've got a hot plate and it gets pretty darn hot.

[–] YiddishMcSquidish@lemmy.today 2 points 2 days ago

Also if your melting it into a bar, the furnace would likely dry it enough for most to consider it "dry"

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