Some Possible Reactions with Sulfide,Sulfate,Sulfite, Bisulfate and Pyrosulfate:
Potassium hydroxide + sulfur dioxide = potassium sulfite + water (I don’t know why potassium sulfite doesn’t have a recipe like sodium sulfite… )
Sodium/potassium hydroxide+sulfuric acid = sodium/potassium bisulfate+water (or sodium/potassium sulfate which may require a selector label to control the ratio of reactions… )
Sodium/potassium bisulfate + sodium/potassium hydroxide = sodium/potassium sulfate + water (although not useful, this reaction is really feasible)
Sodium/potassium sulfite + hydrogen peroxide = sodium/potassium sulfate + water (which can make sodium/potassium sulfite useful, perhaps adding a sulfur dioxide + hydrogen peroxide recipe to sulfuric acid like nitric acid)
Sodium/potassium bisulfate = drying = sodium/potassium pyrosulfate + distilled water (although sodium/potassium pyrosulfate is temporarily not good for use, but this reaction allows it to be available, is also a viable recipe… )
Hydrosulfuric acid + sodium/potassium hydroxide = sodium/potassium sulfide (I don’t remember if there’s any recipe… But at least hydrosulfuric acid can be used to make it useful, not just to recover sulfur from sulfur dioxide.