vano - 1-1-2021 at 12:33
• Today i made some tetrahalomercurates. I usually made copper Tetraiodomercurate. I overheated it and when the water evaporated it turned brown due
to thermochromism. It is usually red in color. I have a little more red, it will just precipitate overnight and this time I will dry it at a low
temperature.
CuCl + K2[HgI4] = Cu2[HgI4] + 2KCl
• Lead diiododibromomercurate is as follows. I added potassium bromide to the mercury iodide and dissolved it in water. Then I heated the solution
slightly and added lead acetate solution. The second photo shows lead diiododibromomercurate. That is why in the first photo their mixture is in a
test tube.
Pb(CH3COO)2 + K2[HgI2Br2] = Pb[HgI2Br2] + 2CH3COOK
• I did the same with cadmium diiododibromomercurate. It is a very nice red compound. It will probably turn yellow when heated. I do not know. But
the interesting thing is that yesterday I mixed cadmium bromide solution and mercury iodide, but nothing happened. And in this way it easily
precipitated. The solution was initially yellow but soon reddened. very strange. I think I will make more of a similar compound.
CdSO4+ K2[HgI2Br2] = Cd[HgI2Br2] + K2SO4
This is a solution of potassium diiododibromomercurate.
[Edited on 1-1-2021 by vano.kavt]
[Edited on 1-1-2021 by vano.kavt]