Question

The cation that will not be precipitated by h2s in presence of dilute hcl is
1)cu2+
2)Pb2+
3)As3+
4)Co2+

Answer 1

Answer:

The cation that will not be precipitated by the H2S hydrogen sulfide in presence of dilute HCl hydrochloric acid is led pb+2 ion.

Explanation:

The cation that will not be precipitated by the H2S hydrogen sulfide in presence of dilute HCl hydrochloric acid is led pb+2 ion.

This is because hydrochloric acid decreases the activity of sulfide ions.