English Vocabulary Flash Cards - Chemical Formulas @ englishpdf.com and englishteststore.com File 143 K2[PtCl4] potassium tetrachloroplatinate(II) K2[PtCl6] potassium hexachloroplatinate(IV) K2 S potassium sulfide K2SO4 potassium sulphate K2SeO3 potassium selenite K2SeO4 potassium selenate K2SnF4 · H2O potassium fluostannate monohydrate K2TeO3 potassium tellurite