tin with selenium

[hendrix1020]

Ive got some tin solder that has some selenium in it,it's only 3% selenium but will this be acceptable to make stannous cloride? Ive been looking around the forum by the way but I didn't find anything.

Any help would be apprietiate

 

[butcher]

I cannot say for sure what would happen, but here is something I would consider.

Selenic acid can be made with an oxidizer acting on SeO2 (selenium oxide), or (H2SeO3) with a strong oxidizer like 30% H2O2, H2SeO4 can be obtained in the solid form as colorless crystals, this acid is strong, about as strong as sulfuric acid, it can even be a stronger oxidizing agent than sulfuric acid, gold is a very unreactive metal (noble metal), gold normally will not dissolve in a single acid like HNO3, H2SO4, HCl, phosphoric...

Interestingly H2SeO4 is the only pure acid that will dissolve gold.

I do not know how a strong oxidizing acid like aqua regia and selenium would react in a stannous chloride test for gold in solution, but I think I would look for a different source of tin, tin or solder is cheap, not having a testing solution that you can rely on can cost a lot of money in gold.

The selenium may not have an effect on the stannous chloride or it test for gold in solution, but I personally would not bet my gold on it.

Someone else may have a better answer.

 

[solar_plasma]

Also HNO₃ and elemental Se will form selenous acid H₂SeO₃. (Römpp)

I am mostly concerned about its toxicity. I would not use this solder.

 

[niteliteone]

It's a natural mineral (salt) here where I live. The farmers have used this water for years, at least until they fallowed the land due to Selenium toxicity. This refuge is about 40 miles from my home.
http://en.wikipedia.org/wiki/Kesterson_National_Wildlife_Refuge
http://en.wikipedia.org/wiki/Kesterson_Reservoir

some uses;
http://chemistry.about.com/od/elementfacts/a/selenium.htm
both good for you and bad too. :shock:

 

[solar_plasma]

It's a natural mineral (salt) here where I live. The farmers have used this water for years, at least until they fallowed the land due to Selenium toxicity. This refuge is about 40 miles from my home.
http://en.wikipedia.org/wiki/Kesterson_National_Wildlife_Refuge
http://en.wikipedia.org/wiki/Kesterson_Reservoir

some uses;
http://chemistry.about.com/od/elementfacts/a/selenium.htm
both good for you and bad too. :shock:

They tell:
"....Selenium concentrations at these locations were found to be greater than 1400 micrograms per liter...." :shock:


wiki:
"....Exceeding the Tolerable Upper Intake Level of 400 micrograms per day can lead to selenosis......

....Elemental selenium and most metallic selenides have relatively low toxicities because of their low bioavailability. By contrast, selenates and selenites are very toxic, having an oxidant mode of action similar to that of arsenic trioxide. The chronic toxic dose of selenite for humans is about 2400 to 3000 micrograms of selenium per day for a long time...."

Sometimes I wonder why we still are alive. :lol:

 

[Lino1406]

Tin chloride will reduce selenium salt to red selenium. This is why
Se is not compqatible

 

[jonn]

H2Se is toxic, adding hcl is Not a bright idea.