Question

Mercury(II) sulfide is insoluble in pure water, but is soluble in a solution of sodium sulfide because: Select the correct answer below: Hg2 can form a complex with sulfide ions Na can form a complex with sulfide ions the excess of sulfide ions pushes the equilibrium toward further dissolution of HgS none of the above

Answer 1

Hg2 can form a complex with sulfide ions

Step-by-step explanation:

The answer to this question is option a. Hg2+ can form a complex with sulfide ions

Whenever there is a chemical reaction between insoluble mercuric sulfide HgS and sodium sulfide Na2S aqueous solution, the results of this reaction is a soluble complex of mercury. that is, it forms sodium disulphidemercurate(ii).

The chemical reaction can be seen below

Hg(s) + Na2S -----> Na[HgS2](aq)