J.R. S. answered 10/08/20
Ph.D. University Professor with 10+ years Tutoring Experience
Hydroiodic acid = HI
potassium sulfide = K2S
2HI(aq) + K2S(aq) ==> 2KI(aq) + H2S(g) ... molecular equation
2H+(aq) + S2-(aq) ==> H2S(g) ... net ionic equation