Ca(H₂PO₄)₂ (s) + K₂SO₄ (aq) → 2 KH₂PO₄ (aq) + CaSO₄ (s)

Reactants:

• Ca(H₂PO₄)₂ – Calcium dihydrogen phosphate
  • Other names: Monocalcium phosphate , Acid calcium phosphate , Calcium acid phosphate ... show moreCalcium diorthophosphate , Calcium biphosphate , Calcium superphosphate , Monobasic calcium phosphate , Monocalcium orthophosphate , Phosphoric acid , Calcium salt (2:1) , Calcium dihydrogenphosphate , Anhydrous monobasic calcium phosphate , E341i , E341(i) show less
  • Appearance: White powder
• K₂SO₄
  • Names: Potassium sulfate , Potassium sulphate , Dipotassium sulfate ... show moreKaliumsulfat , K2SO4 , Sulfuric acid dipotassium salt show less
  • Appearance: White solid ; Colourless-to-white crystals

Products:

• KH₂PO₄ – Potassium dihydroxidodioxidophosphate(1−)
  • Other names: Monopotassium phosphate , Potassium phosphate monobasic; , Phosphoric acid ... show moreMonopotassium salt; , Potassium biphosphate , Monobasic potassium phosphate , Potassium dihydrogen phosphate , KDP , MKP , Potassium phosphate, monobasic , Phosphoric acid, potassium salt (1:1) , Orthophosphoric acid, monopotassium salt , Sorensen's potassium phosphate , Potassium dihydrogen orthophosphate , Potassium acid phosphate , Monopotassium orthophosphate , Monopotassium monophosphate , Phosphoric acid, monopotassium salt , Monopotassium dihydrogen phosphate , Potassium phosphate , Potassium phosphate monobasic , Potassium phosphate,monobasic , Potassium phosphate monobasic (anhydrous) , Monopotassium dihydrogen monophosphate , Monopotassium dihydrogen orthophosphate , E340i show less
  • Appearance: White powder | deliquescent ; Colourless crystals or white crystalline powder
• CaSO₄
  • Names: Calcium sulfate , Plaster of Paris , Drierite ... show moreGypsum , Calcium sulfate (anhydrous) , Anhydrous calcium sulfate , Anhydrous gypsum , Anhydrous sulfate of lime , Calcium salt of sulfuric acid , CaSO4 , Calcium sulphate , Calcium sulfate anhydrous , Sulfuric acid, calcium salt (1:1) , [Note: Gypsum is the dihydrate form and Plaster of Paris is the hemihydrate form.] show less
  • Appearance: White solid ; White hygroscopic powder or crystalline powder ; Odorless, white powder or colorless, crystalline solid. [Note: May have blue, gray, or reddish tinge.]