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Preparation of mercuric iodide

To a solution of 5.7 g of mercuric chloride in 200 ml of hot water pouring, stirring solution of 7 g of potassium iodide in 40 ml of water. The solution is precipitated orange mercuric iodide. Product was filtered off (ideally on a Buchner funnel) and washed thoroughly with warm water (wash thoroughly that we removed poorly soluble, unreacted mercuric chloride).

dry the product at room temperature. The yield was 8 g

Attention! Mercury compounds are highly toxic!

HgCl2 + 2KI --> HgI2 + 2KCl

Mercuric iodide red, finely crystalline precipitate. Dissolve only slightly better soluble in ethanol, methanol, acetone and carbon tetrachloride in the well. The potassium iodide solution responds to soluble tetrajodortuťnatan.

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