2NaAsO2 + 3SnCl2 + 14HCl → 2As + 3H2[SnCl6] + 2NaCl + 4H2O
Sodium orthoarsenite react with tin(II) chloride and hydrogen chloride to produce arsenic, hydrogen hexachloridostannate(IV), sodium chloride and water. Hydrogen chloride - concentrated, heated solution.