Aqua Regia dissolves Gold - Periodic Table of Videos

We dissolve gold into aqua regia (a mixture of nitric acid and hydrochloric acid) for the first of our extra "Molecular Videos" series.
More links in description below ↓↓↓

[mixey]

we need a video on how to recover gold from Aqua Regia. Would be neat

[saltblood]

Ah yes, too much gold, a problem that I oftentimes find myself having.

[BorbolonPrime]

If I had access to videos like these in my teenage years, I'd be a chemist today. As undergraduate engineer, I'll settle for fascination.

[daniels]

that is the most sciencey looking scientist ever

[angryface]

Love the professor's computer desktop - the true trait of a genius are messy tables, messy drawers and messy desktops.

[jenniferjuca]

Vim pelo curso Mestres do ENEM do Umberto Mannarino.

[monteoner]

This video was uploaded 4 years ago, I dread to think about what that guys desktop looks like now

[mschwemberger]

Im just laughing at the dual screen computer in the background.
left screen: A TON of schortcuts some casually random alligned.
Right one: ONE DAMN SHORTCUT

[stardude]

I always wondered how Aqua Regia worked thank you professor.

[ky]

I liked the video because I like your hair.
You really have mastered the scientific hair!

[saracoelho]

Mais alguém que veio do curso do umberto manarino😊

[musaiyabmirzaali]

Great work Brady. Whenever I need to look up anything on any chemical I'm studying about, I come to your channel and most of the time find what I needed.
Keep up the great work!

[Scrap]

I can't express in words how awesome you are, professor!

[miloblackmetalhate]

Raise your hand if that story blew you away!

[papaemeritusiv]

This isn't the Aqua Regia I was searching for. But I'm still entertained nonetheless, so I guess I'll stay for a bit. 😁

[Nayararlage]

Sou do Brasil e vim da aula de um professor de química ( vulgo Umberto) <3

[AllHailZeppelin]

The analogy that comes to mind for me (which I hope is accurate) is tossing a ball up and down. Say you have a tennis ball, racquet ball, whatever, and you start tossing it up in the air; after which it naturally comes right back down. The hand tossing the ball up is like the nitric acid liberating gold atoms from the rest of them, after which they basically all fall back down and reattach to the "lump" of gold. But adding hydrochloric acid is like a different hand coming in from the side right after the ball is tossed up and catching it before it can fall back down.

[altejoh]

Step 1: get gold
Step 2: make aqua regia
Step 3: dissolve gold in aqua regia
Step 4: bubble ammonia gas through gold solution
Step 5: profit
*spoilers*





no actual profit, just explosions when dry

[ashleshagill]

To recover the gold as metal a reducing chemical is added to selectively change the gold chloride into solid gold particles and leave the other metal chlorides unchanged and in solution. When tests show this to be complete the solution is filtered and the gold in the filter thoroughly washed.

[tomatzu]

Alchemy indeed. Aqua Regia is a fun mixture.

Love the new format of Molecular Videos.