[Athiril]

I was just after a method of mixing potassium sulphite in solution from potassium metabisulphite and potassium hydroxide.

I always seem to get precipitate, but I think it may be because I need to keep the two at a cool temperature while mixing and during the reaction?

Whats the ideal method?

Am I able to boil the solution (water and potassium sulphite) to dry anhydrous potassium sulphite and redissolve it later just fine?

I seem to keep botching it up.

[majorjp]

Does the solution contain potassium metabisulfite (K₂S₂O₅) or potassium peroxomonosulfate (K₂SO₅)?