Abstract
Mercurous chloride (Hg2Cl2), or calomel, was prepared by direct synthesis from commercial mercury and mercuric chloride. The mercuric chloride mass fraction in the synthesized material is particularly small. The mercurous chloride vapor pressure was measured between 353 and 453 K by the Knudsen cell method. In order to obtain the mercurous chloride vapor pressure, we took into account the dissociation in the vapor phase into mercury and mercuric chloride. Our results are compared with those in the literature.Key words: mercurous chloride, calomel, vapor pressure, mass spectrometry, Knudsen cell.
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