This is a series of chemical reactions involving potassium $K$ and oxygen $O$, leading to the formation of potassium hydroxide $KOH$, potassium sulfate $K2SO4$, and potassium chloride $KCl$.

K reacts with O to form K2O.K2O reacts with water $H2O$ to form KOH $potassiumhydroxide$.KOH reacts with sulfuric acid $H2SO4$ to form potassium sulfate $K2SO4$.K2SO4 reacts with hydrochloric acid $HCl$ to form potassium chloride $KCl$.