HCL & Bubbler V Aqua Regia Question

[user 72646]

Sorry, this is the same batch as previously discussed

hcl &bleach (this would have dissolved gold) 1day on bubbler

then hcl & bubbler created cucl2 (5 days)

so that is was how I got to cucl2 >aucl>deposited powders.

Cucl2 would have entered solution (aucl) and I believe deposited the gold powder?

 

[Yggdrasil]

Sorry, this is the same batch as previously discussed

hcl &bleach (this would have dissolved gold) 1day on bubbler

then hcl & bubbler created cucl2 (5 days)

so that is was how I got to cucl2 >aucl>deposited powders.

Cucl2 would have entered solution (aucl) and I believe deposited the gold powder?

No but the Gold would have immediately cemented on the Copper in/on the PCBs
When you are doing reactions like this they need to be correct and preferably balanced.
Or make a flow chart so it do not look like reactions.

 

[Yggdrasil]

Sorry, this is the same batch as previously discussed

hcl &bleach (this would have dissolved gold) 1day on bubbler

then hcl & bubbler created cucl2 (5 days)

so that is was how I got to cucl2 >aucl>deposited powders.

Cucl2 would have entered solution (aucl) and I believe deposited the gold powder?

Have a look at this:
https://en.wikipedia.org/wiki/Gold_chloride

 

[Shark]

Now is a good time to learn the use of stannous chloride as well.

 

[user 72646]

Have a look at this:
https://en.wikipedia.org/wiki/Gold_chloride

Great tip.

This looks like Chloroauric acid?

 

[Shark]

Great tip.

This looks like Chloroauric acid?

What does the stannous say?

 

[user 72646]

Hi

stannous advice needed.

I am mixing 1gram Tin Chloride and 20-30ml HCL.
then waiting until clear, then using.
mixed results...

As all of the filtered solutions have a golden slick on surface.
Would this mean gold is out of solution.?
I would need to separate the Chloroauric Acid,(if this is what it is) then dissolve in water (distilled) then test solution.

whats is the best ratio for stannous. my hcl is 30%.?

MM

 

[Martijn]

Hi

stannous advice needed.

I am mixing 1gram Tin Chloride and 20-30ml HCL.
then waiting until clear, then using.
mixed results...

As all of the filtered solutions have a golden slick on surface.
Would this mean gold is out of solution.?
I would need to separate the Chloroauric Acid,(if this is what it is) then dissolve in water (distilled) then test solution.

whats is the best ratio for stannous. my hcl is 30%.?

MM

Did you add stannous chloride to pregnant solutions?

 

[user 72646]

no, no stannous during bubbling in solution?
now solutions filtered with what looks like chloroauric acid.
I need to make another stannous as solution are negative, but this was not an extensive test.

 

[Yggdrasil]

Hi

stannous advice needed.

I am mixing 1gram Tin Chloride and 20-30ml HCL.
then waiting until clear, then using.
mixed results...

As all of the filtered solutions have a golden slick on surface.
Would this mean gold is out of solution.?
I would need to separate the Chloroauric Acid,(if this is what it is) then dissolve in water (distilled) then test solution.

whats is the best ratio for stannous. my hcl is 30%.?

MM

I need to find a smaller spoon.

Stannous: Dissolve any amount of Tin/Pewter in any strength HCl, equals Stannous Chloride testing solution.
Concentrations will vary.

Stannous Chloride test: Drip a drop of the solution to be tested on a piece of white paper,
next drip a drop of Stannous Chloride testing solution next to the first drop and let them mix by gravity and capillary effects.

If Gold was in solution in the first place, it will stay there until the conditions to drop it is created.

Chloro Auric acid looks like an yellowish orange liquid if pure, yours would not even look close to that.

 

[user 72646]

Hi

thanks for info.
if cucl2 can etch silver (not dissolve) and create an agcl (i believe) . and we consider that HCL & Bleach then peroxide are what was in solution (6 day bubbler). are these conditions that would create a silver chloride?
I ask because some of my filtered solutions have a metallic slick on surface, with an incredible blueish-purple silver colour on close ups. it looks metallic, but it is hard to tell from experience.
MM

 

[Yggdrasil]

Hi

thanks for info.
if cucl2 can etch silver (not dissolve) and create an agcl (i believe) . and we consider that HCL & Bleach then peroxide are what was in solution (6 day bubbler). are these conditions that would create a silver chloride?
I ask because some of my filtered solutions have a metallic slick on surface, with an incredible blueish-purple silver colour on close ups. it looks metallic, but it is hard to tell from experience.
MM

The Copper Chloride etch, do not each Silver as it contains chlorides.
As do HCl, it will however create a thin layer of AgCl which will passify the Silver.
If you manage to constantly scrape it off, you will eventually convert much of the Silver to Silver Chloride.
And totally impractical.

 

[user 72646]

Hi all I have dissolved some gold plated materials via hcl & bleach on a bubbler then hcl and peroxide on a bubbler. I have some sands caused by Cucl Aucl transfer I believe , , which has produced brown sands. the sand does not dissolve in water. i understand that gold hydroxide is used for plating.. and as the materials which were processed have lost plating during time in solution I think hismay be gold hydroxide. the sand is a light type golden colour, very bright. is this gold hydroxide? MM

 

[4metals]

This is the equation to make Gold hydroxide, note the strong alkali needed.

HAuCl4 + 4NaOH → Au(OH)3 + 4NaCl + H2O.

I don't see any exposure to strong alkali in what you described.

 

[Martijn]

Hi all I have dissolved some gold plated materials via hcl & bleach on a bubbler then hcl and peroxide on a bubbler. I have some sands caused by Cucl Aucl transfer I believe , , which has produced brown sands. the sand does not dissolve in water. i understand that gold hydroxide is used for plating.. and as the materials which were processed have lost plating during time in solution I think hismay be gold hydroxide. the sand is a light type golden colour, very bright. is this gold hydroxide? MM

Your threads are still about the same sands Yggdrasil asked you to keep toghether.

This science is so versatile and complex that you are looking for answers in the wrong place. And exploring possible reactions and compounds that wil most likely not be there.

You are lost in a foreign country and do not speak the language and do not have a map.
You will not find your way home this week.
That will take some more time. Months.

Read back on your threads and read read read, then try to answer questions.

Please stop messing around with beakers full of toxic messes. If any gold is there, it will stay there to be recoverd later.

 

[user 72646]

I have looked back at list and Sodium hydroxide & sea salt would have entered the solution. The sodium hydroxide was an error *(labelling).

 

[4metals]

i understand that gold hydroxide is used for plating.. and as the materials which were processed have lost plating during time in solution I think hismay be gold hydroxide.

While Gold hydroxide is used for electroplating solutions, not all plating solutions but some formulations use it. But in the electroplating process all of the metal deposited at the cathode is metallic gold, not gold hydroxide. There is no carry over of gold as a hydroxide once a piece has been electroplated, it is then metallic gold.
Gold is also plated out of gold cyanide solutions but there too, the electrodeposited Gold is metallic gold and not gold cyanide.

 

[user 72646]

Your threads are still about the same sands Yggdrasil asked you to keep toghether.

This science is so versatile and complex that you are looking for answers in the wrong place. And exploring possible reactions and compounds that wil most likely not be there.

You are lost in a foreign country and do not speak the language and do not have a map.
You will not find your way home this week.
That will take some more time. Months.

Read back on your threads and read read read, then try to answer questions.

Please stop messing around with beakers full of toxic messes. If any gold is there, it will stay there to be recoverd later.

Hi, Martijn

I am just filtering with water now, all chemicals are stored. not being used.

I am now reading about the 4 states of Gold Chloride.

it appears that there is a possibility that gold is in collected sands.

now I am studying mono-chloride, gold hydroxide, and chloroauric acid.

I have eliminated gold chloride from solutions as nothing (sands) dissolves in water.

And as i did not use Aqua Regia i can possibly rule out chloroauric acid ( as this is a product of AR)?.

Now i am studying the possibility of the material being Gold Hydroxide because this is what is used on gold plating, and because of the chemicals that i used in solution, which may have contributed to the formation of Gold Hydroxide.

Also factors such as the bubbler being turning off for a few hours then being restarted, which would possibly have an effect on the oxidization levels in solution (a point of study).

These are parts of the process which I am examining to see what could have happened within the solution prior to filters and what the sands may consist of..

1 week ago i had no idea how complex gold chloride actually is.. the chemistry is fascinating, as is the learning.

no chems

MM

 

[user 72646]

While Gold hydroxide is used for electroplating solutions, not all plating solutions but some formulations use it. But in the electroplating process all of the metal deposited at the cathode is metallic gold, not gold hydroxide. There is no carry over of gold as a hydroxide once a piece has been electroplated, it is then metallic gold.
Gold is also plated out of gold cyanide solutions but there too, the electrodeposited Gold is metallic gold and not gold cyanide.

Thanks, so electroplating is Metallic Gold not Gold Hydroxide.
All the plated materials in solution have had the gold plating removed by AP.
So, now i research whether the sands dislodged could be metallic gold plating, not gold hydroxide.
And without acid, not using stannous until I read enough to make a chemistry based call on what the sands could be.

Thanks
MM

 

[Martijn]

I need to find a smaller spoon.

Lab reagent spoon?