454 INDEX
Redox reactions, stoichiometry of, 95
Reducing agents, tests for, 107, 108
Reduction, definitions, 91, 92
Resonance, 44, 50
Rubidium
compounds, 126-133
physical properties, 120
reactions, 125
tests, 136
Ruby, 150
Rusting, 398
Rutile, structure of, 36, 127Sandmeyer, 416
Sapphire, 150
Scandium
chemical properties, 369
oxidation states, 362
physical properties, 360, 361
Selenides, 288
Selenium
allotropy, 265
hydrides, 284
occurrence and extraction, 262
oxides and oxoacids, 304, 305
properties, 257-259
reactions, 266-268
uses, 268
Semi-conductors, 166
Sherardising, 418
Silanes, 175, 176
Silica
gel 186
glass, 186
Silicates, 187
'Silicic acid\ 187
Silicon
carbide, 26
halides, 196, 197
hydrides, 175, 176
nitride, 142
occurrence and extraction, 175, 176
oxides, 89, 185,186
physical properties, 16K 166
reaction, 169-172
tests, 204
Silicones, 189
Silver
complexes, 430
compounds, 427-430
horn, 425
physical properties, 426, 427
tests, 430
Silver—conf.
uses, 425
Slaked lime, 133
Soda, ammonia process, 133
Sodium
amide, 126
biological importance, 124
carbonate, 133
compounds, 126-133
hydroxide, 130
physical properties, 120
-potassium alloy, 123
pump, 124
reactions, 125, 126
tests for, 136
uses, 123
Solvation, 44
Spinels, 152
Spodumene, 122
Stability
energy factor, 63
kinetic factor, 64
Stannane, 176, 177
Stibnite, 209, 282
Strontium
compounds, 126-133
physical properties, 120
reactions, 125
tests, 136
Sulphanes, 284
Sulphates, 303, 304
Sulphides, 287, 288
Sulphites, 291-294
Sulphur
allotropy, 265
chlorides, 306, 307
dioxide, 289, 290
halide oxides, 307, 308
hexafluoride, 40, 306
occurrence and extraction, 261
properties, 257-259
reactions, 266-268
tests, 308
tetrafluoride, 306
trioxide, 295, 296
uses, 268
Sulphuric acid
fuming, 302
manufacture, 296-300
properties, 300-302
uses, 300
Sulphurous acids, 291, 292
Superoxides, 130