K2[PtCl4] + 2NaClO4 → Na2[PtCl4] + 2KClO4
Potassium tetrachloridoplatinate(II) react with sodium perchlorate to produce tetrachloridoplatinate(II) sodium and potassium perchlorate. Sodium perchlorate - saturated solution. This reaction takes place at a temperature near 10°C.