11.38 of mercury(II) iodide is combined with a solution prepared from 8.3 g of potassium iodide in 50 mL of water with stirring. Then a solution of 8.5 g of silver nitrate in 150 mL of water is added to the first solution with stirring, the mixture is filtered, washed with water and dried in open air.
HgI2 + 2 KI = K2HgI4
K2HgI4 + 2 AgNO3 = Ag2HgI4 + 2 KNO3
Dissolution of the product
The intermediate compound
Addition of the solution
The mixture after completion
The product exhibiting thermochromism