Question

The cation that will not be precipitated by h2s in the presence of dil hcl is

Answer 1

Presence of hydrochloric acid will decrease the concentration of sulfide ion. The cation that will not be precipitated by hydrogen sulfide in the presence of dil. hydrochloric acid will be lead ion ( Pb ^ 2+ ). The presence of the dilute hydrochloric acid will be intended to weak the hydrated shell of the cation.