English Vocabulary Flash Cards - Chemical Formulas @ englishpdf.com and englishteststore.com File 139 KHC4H4O6 potassium hydrogen tartrate KHSO3 potassium hydrogen sulfite KHSO4 potassium hydrogen sulphate KI potassium iodide KIO3 potassium iodate KIO4 potassium metaperiodate KMnO4 potassium permanganate KNa potassium sodide