The peroxydisulfate ion, S 2O2− 8, is a oxyanion. It is commonly referred to as the persulfate ion, but this term also refers to the peroxomonosulfate ion, SO2− 5. Approximately 500,000 tons of salts containing this anion are produced annually. Important salts include sodium persulfate (Na2S2O8), potassium persulfate (K2S2O8), and ammonium persulfate ((NH4)2S2O8). These salts are colourless, water-soluble solids that are strong oxidants. == Applications == Salts of peroxydisulfate are mainly used to initiate the polymerization of various alkenes, including styrene, acrylonitrile, and fluoroalkenes...

Eisen(III)-thiocyanat ist eine chemische Verbindung. Sie kann wasserfrei als violettfarbene Kristalle Fe(SCN)3 oder als Trihydrat Fe(SCN)3 · 3 H2O isoliert werden. In wässriger Lösung bildet das Eisen(III) mit den Thiocyanationen (SCN−) blutrote, oktaedrische Komplexe. == Komplexe des Eisen(III) == In wässriger Lösung liegen folgende drei High-Spin-Komplexe vor: Die am häufigsten vertretenen oktaedrischen Komplexe besitzen aufgrund ihrer Charge-Transfer-Eigenschaft eine blutrote Farbe, man bezeichnet sie deshalb auch als Charge-Transfer-Komplexe. Wegen ihrer intensiven Färbungen finden sie Anwendung…

Thiocyanatoiron (systematically named thiocyanatoiron(2+)) is a inorganic cation with the chemical formula [Fe(SCN)]2+. It is known to produce a blood red color in solution. This is used as a test for Fe3+ in the laboratory. Fe3+ reacts with thiocyanate to give a series of intensely red colored compounds which remain in the solution and does not undergo any reaction after the formation of the stable octahedral structure. In high concentration of SCN− the compound is fairly octahedral with six thiocyanate ligands bonded to iron atom. Thiocyanatoiron forms a pentahydrate. Thiocyanatoiron must be...

The galvanic series (or electropotential series) determines the nobility of metals and semi-metals. When two metals are submerged in an electrolyte, while also electrically connected by some external conductor, the less noble (base) will experience galvanic corrosion. The rate of corrosion is determined by the electrolyte and the difference in nobility. The difference can be measured as a difference in voltage potential: the less noble metal is the one with a lower (that is, more negative) electrode potential than the nobler one, and will function as the anode (electron or anion attractor) within...