3PtS2 + 18HCl + 16HNO3 3H2[PtCl6] + 6H2SO4 + 16NO + 8H2O
Platinum(IV) sulfide react with hydrogen chloride and nitric acid to produce hydrogen hexachloridoplatinate(IV), sulfuric acid, nitric oxide and water. Hydrogen chloride and nitric acid - concentrated solutions. The reaction takes place in a boiling solution.