Write a net ionic equation for the reaction that occurs when excess hydroiodic acid and barium sulfite (s) are combined

Answer 1

Let's first look at the complete molecular equation: There is a question whether BaSO₃ is considered soluble or insoluble. We will go with it being insoluble, otherwise there will be NO REACTION.

2HI(aq) + BaSO₃(s) ==> BaI₂(aq) + SO2(g) + H2O(l) ... molecular equation

2H⁺(aq) + BaSO₃(s) ==> Ba²⁺(aq) + SO₂(g) + H₂O(l) ... NET IONIC EQUATION