Modern inorganic chemistry

296 GROUP Vt This form melts at 290 K, and boils at 318 K. The ft form, obtained when the a form is allowed to stand for a long ...

GROUP VI 297 2PbS + 3O 2 -> 2PbO + 2SO 2 t 4FeS 2 + 11O 2 -> 2Fe 2 O 3 -f 8SO 2 T Since arsenic is often found in nature a ...

298 GROUP VI There are two processes, (a) and (b), using different catalysts: (a) In the Contact process the catalyst now used i ...

GROUP VI 299 Concentrated sulphuric acid sc Burners \ h Glover SO2,nitrc * tower air,mois T 80% sulphuric acid KJS fumes Lead ni ...

300 GROUP VI concentrated sulphuric acid, to which water is added at the required rate: SO 3 + H 2 SO 4 -> H 2 S 2 O 7 H 2 S ...

GROUP VI 301 CuSO 4 .5H 2 O -» CuSO 4 + 5H 2 O and also 'combined' water, for example in sugars and other organic compounds: C^H ...

302 GROUP VI the value of Ka for the first dissociation indicating that this reaction goes virtually to completion in dilute sol ...

GROUP VI 303 is very low because the large HaSO^ and HSO^ ions can move only slowly through the viscous acid in an electric fiel ...

304 GROUPV! Fe 2 (SO 4 ) 3 -» Fe 2 O 3 + 3SO 3 T 2Ag 2 SO 4 -+ 4Ag + 2SO 3 f + O 2 T Iron(II) sulphate is exceptional. The sulph ...

GROUP VI 305 selenic(IV) (selenious) acid H 2 SeO 3 , a dibasic acid forming two series of salts. Both the acid and its salts ar ...

306 GROUP VI Sulphur hexafluoride, SF 6 , is chemically unreactive, resembling nitrogen, and is unaffected by heat, water, fused ...

GROUP VI 307 Diselenium dichloride acts as a solvent for selenium. Similarly disulphur dichloride is a solvent for sulphur and a ...

308 GROUP VI SOC1 2 + 2H 2 O ^ 4H+ + SOr + 2C1~ Hence on warming, sulphur dioxide is evolved. Sulphur oxide dichloride is used a ...

GROUP VI 309 (a) Na 2 O dissolves in water to give an alkaline solution: C1 2 O dissolves in water to give an acidic solution. ( ...

11 Group VII: the halogens (Fluorine, chlorine, bromine, iodine) PHYSICAL PROPERTIES Table 1L1 and Table 11.2 (p. 314) give some ...

Table 11.1 SELECTED PROPERTIES OF THE ELEMENTS Eliwiii F 9 Cl I? Br 35 I 53 Outer of ion X" ni.j). K 238 332 1255 1142 Electron ...

312 GROUP VI!: THE HALOGENS 0 g . o 400 *: CL cL E 200 , 1500 co IOOO, (^1) Atomic radius ionic radius Ist ionisation energy ent ...

GROUP VII: THE HALOGENS 313 promotion to 3s requires too much energy. Thus fluorine is normally confined to a valency of 1 altho ...

314 200 r Enthalpy (kJmol -200 -400 -600 -800 -IOOO - -1200 L Figure 11.2. Formation of fluoride and chloride iom from the eleme ...

GROUP VII: THE HALOGENS 315 Electron affinity and hydration energy decrease with increasing atomic number of the halogen and in ...