II Chloride FeCl

A battery system closely related to Na-S is the Na-metal chloride cell. The cell design is similar to Na-S however, iu addition to the /3-alumina electrolyte, the cell also employs a sodium chloroaluminate, NaAlCL . molten sail electrolyte. Tlie positive electrode active material consists of a transition metal chloride such as iron(II) chloride, FeCL, or nickel chloride, NiCty, in lieu of molten sulfur. This technology is in a younger state of development than the Na-S. 

In the Stock system, FeCl2 would be called iron(II) chloride, FeCls would be iron(III) chloride, and PbBr4 would be called lead(IV) bromide. The lUPAC naming system uses the Stock method. 

Iron halides are the most common of these salts [more specifically as a chloride iron(II) chloride (ferrous chloride or FeCl2) and iron(III) chloride (ferric chloride or FeCls)]. 

EXAMPLE 13.13. Name the following according to the Stock system (a) FeCl, (6) U02S04, and (c) P4O10. (a) Iron(II) chloride, (b) dioxouranium(VI) sulfate, and (c) phosphorus(V) oxide. 

Reaction II 4 FeCl, + 3 IQFetCN), - Fe4[Fe(CN)6]3 + 12 KC1. The dispersed phase contained the ferrocyanide, and at time t = 0 a few drops containing the ferric chloride were added. Because the product Fe4[Fe(CN)6]8 had a blue color, the course of reaction again could be followed by measuring the light absorption. 

Titanium cesium alum, 6 50 Titanium (II) chloride from disproportionation of titanium (III) chloride, 6 56, 61 Titanium(III) chloride, 6 52, 57 Titanium (IV) chloride, reduction of, with hydrogen, 6 52, 57 Titanium complex compounds, cations, with acetylacetone, [Ti-(C.H. hTiCl, and [Ti(C6H7-0,),]FeCl , 2 119, 120 Titanium(IV) oxide, extraction of, from ilmenite, 5 79, 81 to titanium powder with calcium, 6 47... 

Fe(CO) 4K Iron tetracarbonyl dihydride, potassium salt, 2 244 [Fe(C204)3]K3-3H20 Potassium trioxalatoferrate(III), 1 36 [Fe(C5H5N)4]Cl2 Tetrapyridine-iron(II) chloride, 1 184 FeCl2 Iron(II) chloride, 1-hydrate, 5 181 2-hydrate, 6 179 FeCl Iron (III) chloride, 3 190 ... 

Gadolinium(III) oxide +53200 Iron(II) chloride tetrahydrate FeCl -dH O +12900... 

The compound FeCl2, then, contains one Fe ion and two d ions. We call this compound iron(II) chloride, where the II tells the charge of the iron cation. That is, Fe is called iron(II). Fikewise, Fe " is called iron(III). And FeCls, which contains one Fe ion and three Cl ions, is called iron(III) chloride. Remember that the Roman numeral tells the charge on the ion, not the number of ions present in the compound. 

Iron (III) chloride hexahydrate (FeCls, 6H2O) and anhydrous Iron (II) chloride (FeCl2) were purchased from Sigma-Aldrich. Ammonium hydroxide (32 wt% NH3) and oleic acid were purchased from Merck and Fluka, respectively. Styrene and divinylbenzene (DVB), either from Merck or Aldrich, were purified by passing through neutral... 

In cases where a metal cation may have more than one possible charge, recall that the charge is indicated in the name of the ion with a Roman numeral in parentheses. Thus, the compounds FeCL and FeCL are named iron(II) chloride and iron(III) chloride, respectively. (These are pronounced iron-two chloride and iron-three chloride. ) Figure 2.16 summarizes the steps for naming molecular and ionic compounds. 

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