2 KOH (aq) + MgCl₂ (aq) → 2 KCl (aq) + Mg(OH)₂ (s)

This is a precipitation reaction: Mg(OH)₂ is the formed precipitate.

Reactants:

• KOH – Potassium hydroxide
  • Other names: Caustic potash , Lye , Potash lye ... show morePotassia , Potassium hydrate , KOH , E525 , Potassium lye , Lye [Potassium hydroxide] show less
  • Appearance: White solid, deliquescent ; White hygroscopic solid in various forms ; Odorless, white or slightly yellow lumps, rods, flakes, sticks, or pellets. [Note: May be used as an aqueous solution.]
• MgCl₂
  • Names: Magnesium chloride , Magnesium dichloride , Magnesium chloride anhydrous ... show moreMgCl2 , [MgCl2] show less
  • Appearance: White or colourless crystalline solid ; Deliquescent white solid in various forms

Products:

• KCl
  • Names: Potassium chloride , Sylvite , Muriate of potash ... show moreKlor-Con M15 , K-Lease , Klor-Con 8 , K+10 , K+8 , Klor-Con M10 , Micro-K 10 , Kato , Kaon Cl-10 , Kaon-Cl , Kaon Cl , Micro-K , Klor-Con 10Meq , Klor-Con 10 , Micro-K Ls , K-dur , Klor-Con , Klor-Con M20 , Slow-K , Ten-K , Klotrix , [KCl] , Kaliumchlorid , Chloride of potash , Kaon-CL 10 , Klor-CON , KCl , Monopotassium chloride , K-Tab , Chlorid draselny , Potassium Chloride show less
  • Appearance: White crystalline solid ; Colourless hygroscopic crystals
• Mg(OH)₂ – Magnesium hydroxide
  • Other names: Magnesium dihydroxide , Milk of magnesia , Magnesia, [Milk of] ... show moreMg(OH)2 , Magnesium hydrate show less
  • Appearance: White solid