2K2[PdCl4] + 4(NH3•H2O) → [Pd(NH3)4][PdCl4] + 4KCl + 4H2O
Potassium tetrachloridopaladate(II) react with ammonium hydroxide to produce tetraamminepalladium(II) tetrachloridopalladate(II), potassium chloride and water. Ammonium hydroxide - diluted solution.