vano
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Best way to make any divalent mercury salt from Nessler's reagent
Hi. i have liters of Nessler's reagent. I know its useful reagent, but its too much for me. I want to make any divalet mercury salt from this
solution. I'm just interested what is the best way. I tried some ways but nothing important.
[Edited on 22-11-2021 by vano]
[Edited on 22-11-2021 by vano]
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Bedlasky
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Just add acid.
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vano
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its work on sulfuric acid, because sulfate is insoluble( as i remember). i added nitric acid, but nothing happened. also its very old reagent, made in
1972. I do not know how the reagent could be contaminated, but the mercury couldn't go nowhere. In addition, as a Nessler's reagent it does its job
perfectly.
[Edited on 22-11-2021 by vano]
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macckone
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add a large excess of potassium hydroxide. It should precipitate the mercury(II) hydroxide, leaving potassium iodide in solution.
this is one way to break the reagent.
alternatively add ammonia until it precipitates the complex.
then process out the precipitated ammonia mercury iodine complex.
hydrogen sulfide will yield the insoluble mercuric sulfide.
dealing with nasty toxic stuff while trying to deal with toxic stuff is a thing.
There are probably a dozen other ways to attack the reagent.
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vano
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Thanks. You and Bedlasky both are right, but i decided to make some complexes for my collection, for example monovalent copper tetraiodomercurate.
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