Almost all surfur compuunds may generate HS when add acid. HCL for example.

You can generate sulfide (H2S) by reacting iron sulfide with hydraulic acid (HCl). The reaction products will be iron chloride and H2S.

I teach this approach in my chemical engineering teaching laboratory at Yale University.

Hope this helps answer your question.

Professor Yehia Khalil

Yale University

USA

Professor Yehia Khalil

I need to know the concentration i am adding each time.