stanous chloride test

[arthur kierski]

when i test for gold in an ar solution with stanous chloride i get a deep black spot that after 10minutes returns to the original ar green collor---what is happening? please give me some help

 

[lazersteve]

Arthur,

Dilute the test sample so you can better tell what color(s) you are getting.

Palladium tests fade after a short time and can also appear very dark colored if the concentration is high.

Steve

 

[arthur kierski]

thanks Steve,i will do that(dilute the test sample)

 

[Harold_V]

It is not uncommon for a test to re-dissolve if the residual acid content is excessive. You may find that it won't do that if you evaporate the gold chloride solution, with the added benefit of the resulting test being more vivid as well.

Harold

edit: corrected spelling

 

[arthur kierski]

thanks Harold----i thought that might be redisolving because of lot of residual acid