Gold Plating Measuring Cups For My Mom

Gold Plating Measuring Cups For My Mom

Hi everyone, welcome back to Cody’s Lab! so tomorrow is mother’s day and I happen to know that my mom needs measuring cups so I went and bought her some steel measuring cups as you can see here now, this is a little bit boring so I thought
“why don’t I do something interesting, say, plate them in gold” so, lets dissolve some gold I ‘ve got a little bit of gold here from my gold bullet project this is just little scraps that I had left over from when I cut the bullet to shape after casting it you can see here I’ve got quite a bit of gold actually I think I’ve got over a [little] more over half an ounce right there It’s mixed with some paper bits so I’ll try to select the pieces out
that don’t have paper on them so there’s actually an easy way to
seperate the paper bits from the gold thats just to blow on it the gold is very dense so it will stay put while the paper will blow away there we go looks like I lost a few pieces but I caught them back on this paper here alright, so that’s actually probably way more gold than I need, but it’s not going to hurt to have too much now I’m going to add some hydrochloric
and then nitric acid so now the nitric acid
don’t really need that all that much the nitric acid is just to oxidise the gold so that the hydrochloric can dissolve it you can see the solutions colour is changing a little bit already. the gold is dissolving so I just dropped the anvil on my foot fortunately I was wearing steel-toed boots and uh, It didn’t hurt my toes at all, although the shoe It’s got a little bit of a rip in the leather these were old boots anyway but yeah, thats one reason why I always wear steel-toed boots when I’m working around stuff anyway, while that gold in there is dissolving I
wanted to take a piece of this, one of these chunks of gold and kind of stretch
it out into a long rod that I can use as my positive electrode ohh, its crumbly… i’ts crumbly gold. hello, hello puppy might have to remelt the gold or
at least anneal it so it’s softer smelting it seems to work so I’m just
going to melt it together into a long strip that’ll do so that’s actually a nice little
gold bar very heavy my guess is right around 10 grams so that’s about $300
worth of gold anyway here’s the solution looks like it’s mostly all dissolved so
now I’m going to take this, I’m gonna pour it into the larger beaker and
that’ll leave behind all the sand and stuff
so rinse this out with a little bit of water okay so now we’ve got to get the gold
into a form that is usable for electroplating I could electroplate with
this but it would form gold that was… it wouldn’t be a flat layer it would just
kind of bunch up in to gold crystals so I need to convert this into a cyanide
solution one way I know to do that is to neutralize it and form gold hydroxide
the gold hydroxide is soluble in cyanide and doing it like this I don’t have to
evaporate the solution down or turn it into a metallic powder and there you go there’s the gold hydroxide forming, should be a brown powder so now that I’ve got the
solution neutralized and diluted I’m going to add a little bit of sodium
hydroxide to make a very caustic solution with some sodium cyanide let’s take a chunk of this out
let’s put this in and dissolve it up
cyanide of course will dissolve the gold hydroxide into gold cyanide which is soluble
now I’m going to add the sodium hydroxide cyanide solution to the gold
hydroxide now hopefully that goes clear it’s definitely going clear you can see
it changing color looks like it’s going to take a little bit
might even need a little bit of dissolved oxygen to make it work so it will take
some time before this is completely clear in fact I think it does produce
some amount of metallic gold as the cyanide reacts with hydroxide but
the metallic gold should dissolve over time as oxygen mixes in the solution so
while we’re waiting for that let’s clean these cups off so the gold will stick
properly let’s make us a little bit of a dilute hydrochloric acid just give these
a good dunk clean off surface contamination and oils now that they’ve
all been blasted with a hydrochloric acid and the surface should be clean I’m
going to neutralize them with some sodium hydroxide that way I’m not reacting the acid with the cyanide which
would of course make hydrogen cyanide gas which is a little bit more dangerous
negative to the thing I want plated positive to the gold so what’s happening
here is the electrons are going into the negative electrode and they’re reducing
the gold at the surface of the metal at the positive electrode electrons are
being taken away this oxidizes the gold so it dissolves into the solution as you
can see we’re getting a layer of gold on the surface of the part I might have to
go find some alligator clips or something so I don’t have to sit here
and hold this is going to take a little while I can just let it sit here
for long periods of time and when I need to I can take it off and move it around so
I can get the other side this is going to take a little while to get these all
processed it should look cool when they’re done. Ok so here’s the big one we
just let it sit in there for about 20 minutes let’s go take this out rinse it
off and see what else needs to happen with it it seems like I’m going to have
to dip them multiple times they’re getting shiny it’s hurting my eyes
I’m just going to blot this dry it seems to do better when it’s
dry it’s like it helps the gold stick to it like once it dries out then I can get
it wet again and it won’t be a problem it’s almost like the water keeps the
gold from sticking so what I’ve been doing is after the first dip in the
electrolysis solution just lightly rub it with some steel wool if the gold
comes off I’ll know that I’ve got to rub that area to clean it and then dip it
again it looks like this back portion here the gold is pretty thin so I’m
going to move over to here to the side look at that it actually takes a polish
steel wool does quite well for this like see here where the gold has rubbed
off so what I’m going to do is take the steel wool and just rub this really hard right
there to take whatever was keeping the gold from sticking hopefully remove it
in that spot now when I put it back in the gold should be better able to stick
to that location seems to be doing pretty good on this side right here
though the steel wool’s probably pretty harsh but I want to make sure it stays on I
don’t want this coming off through ordinary use Kanyon’s got a little bit
softer touch than me so I’m having her finish them up. How’s it looking? “pretty good” yeah no major bare spots? “I don’t think so” that’s all holding up to the scrubbing looks good so there it is four measuring
cups plated in 24 karat gold how about that there’s still a few spots that the
gold never did stick I never could get it to stick in some of the certain areas and
also being 24 karat gold it is fairly soft so it will wear off in places I’m
sure excessive scrubbing will remove the gold layer but it should hold up for
normal use any way let’s say we should go give them to my mom
hey there “hey” I’ts a day early but I need to put the video out so “Alright let’s see what you got” “oh my gosh they’re gold that is super cool” “how in the heck did you do that?” little bit of chemistry magic. “look how cool I won’t dare use them though, that is
awesome! I won’t have to worry about them being
taken out of my cupboard being used for another chemistry experiment. That is
super cool, very awesome” “Thank you!”
No problem. [Music]


  1. "…Which of course would make hydrogen cyanide gas, which is a little more dangerous"
    Yes, just a gas which was weaponized as a chemical warfare agent in WWI and in concentration camps 😉

  2. At about 8.30 I got really freaked out and thought u had pretty painted finger nails and girly hands then I realized it was your girlfriend I missed when u said she was finishing them lol I really love your gold plating videos please do more

  3. i aways use steel toed boot but never gloves, waitting for the video that he says i lost a finger today

  4. Your gold doesn't stick well because you used wrong voltage. You need to calculate it. It's proportional to the coating surface.

  5. dude you are crazy smart. and chemistry experiment ? call it what it is, alchemy.

    and yes i know the word chemistry comes from alchemy

  6. I don't think she was very impressed with her gift. Cody put hella time, effort and gold into that. He used close ro 10 grams of 24k.

  7. Have you heard of a plastic container to put your gold in? instead of a piece of paper? Damn! These millennials have mo common sense.

  8. It might sound a noob question, but considering cyanide was used in the plating process, how safe are they for food use?

  9. Love how your dog reacted to the high pitch hammer upon anvil action.
    I'm very tempted to copy this, I have very colour photography chemicals from the 70s. I'm sure one is sodium cyanide.

  10. I know this video is older, but that's great man, I was hoping you'd show giving them to ur Mom and you did and I loved it man, Great job

  11. Basically saying "happy mothers day, now get back into the kitchen" my mum would be so underwhelmed. Instead of trying to make jewellery or a small figure…you got her measuring cups…

  12. Hey Cody. I know this is an old video but I’d love to see you copper plate items. My wife loves copper and I’d love to plate some items for her

  13. What a sneaky way of inducing heavy metal poisoning in someone you don't like, plating foodware in soft 24k gold and then gifting it to them.
    You know there's a reason alloys exist, right?

  14. Very cool video!!
    But…and this is not aimed at you… It's just that the "modern" response to "thank you" is annoying me more and more lately!!
    The right response to Thank You is not…"no problem."
    The correct response to Thank You is…(drum roll please) "You're Welcome"!!!
    Thank you!!!

  15. Absolutely fantastic Cody bro 👍… Keep em coming old boy keep em coming !!!! As we say in Britain- fandidly tastic and assuringly fascinating 💪👍👋😁…

  16. becareful heating the top of your anvil as it is a hardened surface and you can remove its temper …. hot metal that is being forged is unlikely to to do it but melting gold on it is not … 1400c compared to 1000c to 1200c of forged items that cool with the mass of the anvil … best to melt gold on a granite surface or a ceramic surface

  17. Hi Cody. Great video and information. I'm trying to learn to make 18k and lower karat plating solution. Couldn't find something as simple as this informative video on the web. My best guess so far is to mix silver cyanide + copper cyanide to this solution to get 18k and 14k yellow or red gold plating results. Do you think that will do? If not then can you give some info on how to achieve this for me please. Thanks for the great contents. I can't get enough of your videos. @Cody'sLab

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