Quote: Originally posted by Antiswat | also add NH4OH to the stuff
it should turn the solution dark blue due to tetraammine.. you should get TACPS by this if im not mistaken (:
interesting exotic primary, not very strong tho | No, you're wrong. Adding ammonia to it does nothing. What
you are referring to is adding ammonia AND a copper salt to it, or even better, ammonia and cuprous hydroxide.
The royal blue color is due to formation of the complex [Cu(NH3)4](2+) and this has nothing to do with persulfate. This is the first three letters of
the acronym TACPS, which stands for Tetra Ammine Copper Peroxo Sulfate. Other similar salts exists, ike TACN (the nitrate) and TACP (the perchlorate).
For testing whether a compound is a persulfate, this thing with copper has no value. Use one of the other suggested methods to check for persulfate.
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