It can also be prepared by mixing mercury salt with chloride ions.
1) It is a white powder which is insoluble in water.2) Hg2Cl2 on heating dissociates into HgCl2 and Hg.
HgCl2 is a corrosive sublimate, which is prepared by passing chlorine over heated mercury or mercury chloride.
It can also be prepared by heating mercury sulphate with NaCl.
1) It is a crystalline solid.2) It is soluble in hot water, ethanol and ether.
3) HgCl2 reacts with KI and forms a colorless solution known as Nessler's reagent.