Modern inorganic chemistry

276 GROUP V! products, then the substance is heated in a current of dry nitrogen, and the evolved water absorbed in a U tube con ...

GROUP VI 277 support the view that the hydrogen atoms are directly attached to the phosphorus and are not present as hydroxyl, — ...

278 GROUP VI Alternatively an ice-cold dilute solution of sodium peroxide is passed through a column containing a cation-exchang ...

GROUP VI 279 PROPERTIES Pure hydrogen peroxide is a colourless, viscous liquid, m.p. 272.5 K, density 1.4 gem"^3. On heating at ...

280 GROUP VI (IV) oxide, the latter being used in the common laboratory prepara- tion of oxygen from hydrogen peroxide (p. 260). ...

GROUP V! 281 The hexacyanoferrate(III) ion is reduced in alkaline solution to hexacyanoferrate(II): [Fe(CN) 6 ]^3 " + H 2 O 2 ...

282 GROUP VI porous concrete and foam rubber where the evolved oxygen leavens' the product. Hydrogen peroxide is a useful antise ...

GROUP VI 283 Hydrogen sulphide is slightly soluble in water, giving an approxi- mately 0.1 M solution under 1 atmosphere pressur ...

284 GROUP VI solution, making the reactions valuable in the detection of metal cations in aqueous solution. TESTS FOR HYDROGEN S ...

GROUP VI 285 BINARY COMPOUNDS The elements (X) in this group are two electrons short of a noble gas structure which they can ach ...

286 GROUP VI A1 2 O 3 + 6OH~ + 3H 2 O -> 2[AI(OH) 6 ]^3 - Notice that the acidic character is associated with the ability of ...

GROUP V! 287 The two oxides formed with hydrogen, H 2 O and H 2 O 2 , have already been discussed, but it should be emphasised t ...

288 GROUP V! They are rapidly hydrolysed by water and the hydrolysis of solid aluminium sulphide can be used to prepare hydrogen ...

GROUP VI 289 the elements. At room temperature, sulphur dioxide is a gas, boiling point 263 K, selenium dioxide is a volatile so ...

290 GROUP V! Liquid sulphur dioxide as a solvent Liquid sulphur dioxide is a solvent for a number of substances, for example iod ...

GROUP VI 291 'SULPHUROUS ACID' The solution obtained when sulphur dioxide dissolves in water has long been thought to contain un ...

292 GROUP VI This reaction is a useful test for a sulphite or for moist sulphur dioxide, which turns 'dichromate paper' (filter ...

GROUP VI 293 SULPHITES AND HYDROGENSULPHITES When a saturated solution of sulphur dioxide is titrated against approximately 2 M ...

294 GROUP VI Alternatively these salts can be prepared by first saturating a known volume of alkali with sulphur dioxide, giving ...

GROUP VI 295 SULPHUR TRIOXIDE Sulphur trioxide was first prepared by heating iron(III) sulphate : Fe 2 (SO 4 ) 3 -» Fe 2 O 3 + 3 ...