I figured out that KCl + NaOH may result in KOH but I think this reaction can not happen in an aqueous medium. So there I have a couple of questions.

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Is there a way to lớn make the reaction I stated above to lớn happen?Is there a way khổng lồ turn KCl into KOH?

On an industrial scale, the preferred method for the production of potassium hydroxide from potassium chloride is electrolysis (diaphragm, mercury, or membrane process).

eginalignce2Cl- &-> Cl2 + 2e-\ce2H2O + 2e- &-> H2 + 2OH-\hlinece2Cl- + 2H2O &-> Cl2 + H2 + 2OH-endalign

or

$$ce2KCl + 2H2O -> 2KOH + Cl2 + H2$$

I think the reaction does not works very well, because you get an equilibrium of KOH and NaOH.

If you have KCl in an aqueous solution you can use AgOH lớn get KOH. AgCl precipitate & the solution contains only KOH. If you like to get KOH it is better to buy them.

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