Dissolving gold

[Yggdrasil]

The short answer should include the question: Which metal acetates and chlorides?

I was asking in general terms, but the intention was with respect to what we see in E waste.
I guess they will be caught in the same way as we treat the waste today?
Cementation first and then forming hydroxides which are filtered out.

 

[Ultrax]

Then, chlorides are generally more dangerous, except perhaps lead acetate. Acetates and citrates of most heavy metals are in stronger complexes than chlorides.

 

[Yggdrasil]

Then, chlorides are generally more dangerous, except perhaps lead acetate. Acetates and citrates of most heavy metals are in stronger complexes than chlorides.

Ok, thanks

 

[Dodoldodol]

Sorry for my bad english and thank you for your all reply is really expand my knowldge.

 

[Marcel]

Anyone here who knows the toxicity level of common Acetates versus Chlorides?

I'm not an expert on general toxicity, but I have strong opposition to the use of vinegar due to the possible creation of lead acetate. Lead is frequently found in vintage electronics, so it is important to exercise caution, particularly for beginners.
I encourage everyone to be aware of the dangers associated with acetate compounds, specifically lead acetate, and to educate themselves accordingly.

Hazardous Substance Fact Sheet - NJ.gov

 

[Yggdrasil]

I'm not an expert on general toxicity, but I have strong opposition to the use of vinegar due to the possible creation of lead acetate. Lead is frequently found in vintage electronics, so it is important to exercise caution, particularly for beginners.
I encourage everyone to be aware of the dangers associated with acetate compounds, specifically lead acetate, and to educate themselves accordingly.

Hazardous Substance Fact Sheet - NJ.gov

My sentiment exactly.

 

[Christian333]

I doubt that reading this from wiki: Peracetic acid - Wikipedia

Production​

Peracetic acid is produced industrially by the autoxidation of acetaldehyde:[2]

O2 + CH3CHO → CH3CO3H
In the presence of a strong acid catalyst, such as sulfuric acid, acetic acid and hydrogen peroxide produce peracetic acid:[3]

H2O2 + CH3CO2H ⇌ CH3CO3H + H2O
However, in concentrations (3-6%) of vinegar and hydrogen peroxide marketed for household use, mixing without a strong acid catalyst will not form peracetic acid.


Anyway a flashpoint of 40 degrees C is not that dangerous. Just keep it below that temperature and keep ignition sources away.
And if ignition of vapors occurs, you will have a flame over a liquid that can be put out.

I think the threshold limit values and adverse health effects are of bigger concern, IF you actually create PAA

Safety[edit]​

Peracetic acid is a strong oxidizing agent and severe irritant to the skin, eyes, and respiratory system. The U.S. Environmental Protection Agency published the following Acute Exposure Guideline Levels (AEGL):[12]

eight-hour TWA AEGL	Definition	mg/m3	ppm
1	The concentration at which the general population will experience transient and reversible problems, such as notable discomfort, irritation, or certain asymptomatic non-sensory effects.	0.52	0.17
2	The concentration that results in irreversible or other serious, long-lasting adverse health effects or an impaired ability to escape.	1.6	0.52
3	The concentration that results in life-threatening health effects or death.	4.1	1.3

Martijn.

Thanks bunches Martijn.
Seems the Facebook group I am in has been warning against this without reason.
I am very thankful for your knowledge and reply.

Janie

 

[Martijn]

Thanks bunches Martijn.
Seems the Facebook group I am in has been warning against this without reason.
I am very thankful for your knowledge and reply.

Janie

Thank you.
I just google it on wiki or look for a msds.

I have learned a lot from searching for answers i did not have until a new member asked. Like this one.
Always check yourself and ask here if you can't find it.
There are a lot of misconceptions out there.

If i want to know a chemical reaction I type in the chemical names with a + in between and start reading.

 

[Dodoldodol]

Can smb get expired?, because when i wanna to precipate didnt drop anything then i put zinc foil gold dropped from sulution. my smb alredy hard like rock, i buy 2 days ago and now hard like rocks, i ask to seller is this sodium metabisulfite or metabisulfate, they answer is metabisulfite, can i burn this smb and using SO2 from that and precipitate gold?

 

[Yggdrasil]

Can smb get expired?, because when i wanna to precipate didnt drop anything then i put zinc foil gold dropped from sulution. my smb alredy hard like rock, i buy 2 days ago and now hard like rocks, i ask to seller is this sodium metabisulfite or metabisulfate, they answer is metabisulfite, can i burn this smb and using SO2 from that and precipitate gold?

SMB has a unpleasant smell of SO₂.
But the solution need to be acidic to react and create SO₂.
Add some more HCL to the solution and see if it spontaneously drops the Gold.

 

[letmepicyou only]

I'm not an expert on general toxicity, but I have strong opposition to the use of vinegar due to the possible creation of lead acetate. Lead is frequently found in vintage electronics, so it is important to exercise caution, particularly for beginners.
I encourage everyone to be aware of the dangers associated with acetate compounds, specifically lead acetate, and to educate themselves accordingly.

Hazardous Substance Fact Sheet - NJ.gov

I use acetic acid to clean rusty iron and then treat the resulting iron(2) and iron(3) acetate with hydrogen peroxide to turn it all into iron(3) acetate. Iron acetates are pretty ridiculously safe. So it definitely has its place, but as you said, perhaps not in electronics.

 

[Yggdrasil]

I must say u got alot of think they know it all and have God powers the way u have to constantly correct and make the beginners feel like we should know terminology we are here to help each other not criticize and belittle others so quit the **** idc u wanna kick me off or delete this comment its cause truth hurts . Sick and tired every forum its the same *** in 9 seniors hVe to call duty and act like president here get a f+++ing life just cause u know how to do this don't make u better than someone that don't so respect us u miserable gold freak. Seriously or get the hell out . Now go ahead mr know it all tell me how it is. If I were in front of u and u talk to me like I'm your peasant I would correct t u by meaning. ..u would not do it again and be easy on others a d yes the hell I would !!!

I will delete this post.
If you want help, you fix your attitude fast, this is your only warning.

 

[Martijn]

WOW!! You know the first impression is the lasting one!! Well done sir!!

A warning is no longer in order imo, he has passed that station with light speed.

Such an extreme foul mouth, and that in his first post ever can get an IP- and a Mac adress Ban for life for all I care.

This type of underdeveloped primitive organism has no place in chemistry nor on a civilized scientific forum. It only fouls the whole community, makes it stink and scares off normal civilized human beings. Lets push this ugly thing back where it came from and let it dwell in it's own filth.

What was it again?
Trash in? > trash OUT!

Yes, this makes me very mad, I've had it with all the low lives on this planet!

 

[dervishh]

I very much appreciate the wisdom that you guys shine and the way you guys easly bat down someone with an unfortunate viewpoint , with the true insight that comes from the experience that produces said wisdom. It gives this fourm character and proves that truth will always outshine ignorance

 

[peterross149968]

I am deeply concerned about the mindset and bad attitude of the individual. I think that he has a chip on his shoulder.
To which end, I believe that it is a fine line between good and bad.
His switch could flip and end up hurting others physically, especially with dangerous chemicals at his disposal. There is no place for complacency.
Cease.

 

[Yggdrasil]

I am deeply concerned about the mindset and bad attitude of the individual. I think that he has a chip on his shoulder.
To which end, I believe that it is a fine line between good and bad.
His switch could flip and end up hurting others physically, especially with dangerous chemicals at his disposal. There is no place for complacency.
Cease.

He is on the cooler for a week. He will be allowed in after that. If he continue the same way he will be permanently out!

 

[Golden DALB]

I'm not an expert on general toxicity, but I have strong opposition to the use of vinegar due to the possible creation of lead acetate. Lead is frequently found in vintage electronics, so it is important to exercise caution, particularly for beginners.
I encourage everyone to be aware of the dangers associated with acetate compounds, specifically lead acetate, and to educate themselves accordingly.

Hazardous Substance Fact Sheet - NJ.gov

This is good to know, but also worrying as I currently have e-waste soaking in Vinegar & Peroxide. I decided on this route as I am not able to source Nitric (HNO3) at the moment. Could I use Sulfuric Acid (H2SO4) to precipitate out the lead (Pb) or use tin (sn) to cement it out or is there another way to clean it up?
Also what would be a better way to put the base metals and silver (Ag) into solution?


Edit: Changing "(Ar)" to "(Ag)"

 

[Ultrax]

The simplest way to obtain spongy metal lead is by heating acetate to a temperature of 280C.
Why do you need to purify lead? This is a rather complicated procedure; It's easier to buy pure lead.

P. S. (Ar) means Argon, and (Ag) means Silver.

 

[Golden DALB]

The simplest way to obtain spongy metal lead is by heating acetate to a temperature of 280C.
Why do you need to purify lead? This is a rather complicated procedure; It's easier to buy pure lead.

P. S. (Ar) means Argon, and (Ag) means Silver.

I don't want to purify lead, I just want to get the lead acetate out of my solution.

 

[Alondro]

The salts of Acetic acid which is an organic acid are more prone to interact with biology and such may be more poisonous.
An example is Lead Acetate which is also called Lead Sugar since it is a white powder tasting sweet, but it is very bad for any living being.
Using Vinegar will also produce much more waste solution since you need much more volume to get the same effect.
How much does a Liter of Muriatic/HCl cost in the hardware shop there, it is usually very cheap.
15-25% is plenty strong enough.

Have you studied the things we asked you to yet?
Especially Hokes book, safety and waste treatment?

Lead acetate is no more toxic than any other lead salt. It is only more dangerous because it tastes sweet, therefore people will tend to eat it without suspecting anything is wrong, as opposed to a bitter-tasting toxic salt. Long ago, it was even used as a sweetening adulterant in cheap sweets, and as a sweetener and preservative in wine. This, naturally, resulted in lead poisoning cases!