CONTENTS. vii 



PAGE 



Carborundum Boron, boric acid; tests for it Sodium per- 

 borate 178-189 



15. Theory of electrolytic dissociation, or ionization, etc. 



Theory of electrolytic dissociation Composition of ions 

 Ions and atoms not the same Symbols representing ions 

 Ionic equilibrium. Ionization constant Effects of ionic equi- 

 librium in chemical reactions Precipitation Electrolysis 

 Secondary changes in electrolysis Faraday's laws Conduc- 

 tivity Electromotive force required in electrolysis Electro- 

 chemical series of the metals Acids Independence of ions 

 Analytical reactions or tests Kinds of ions formed by acids 

 Activity or " strength " of acids Bases Salts Acid and basic 

 salts Hydrolysis of salts Neutralization Heat of neutrali- 

 zation Degree of dissociation of common substances .... 189-203 



16. Sulphur. Selenium. Tellurium. 



Occurrence in nature Properties Crude, sublimed, washed, 

 and precipitated sulphur Sulphur dioxide Sulphurous acid ; 

 tests for it Sulphur trioxide Sulphuric acid : its manufac- 

 ture, properties, and ions Tests for sulphates Sulphur acids 

 Pyrosulphuric acid Thiosulphuric acid Hydrogen sul- 

 phide ; tests for it Ions of hydrogen sulphide and its salts 

 Use of it in analysis Carbon disulphide Selenium Tellu- 

 rium Ionic mechanism of the solution by acids of salts that 

 are insoluble in water 204-219 



17. Phosphorus. 



Occurrence in nature Manufacture, properties, and modi- 

 fications Poisonous properties and detection in cases of pois- 

 oning Oxides of phosphorus Hypophosphorous acid ; tests 

 for it Phosphorous acid ; tests for it Metaphosphoric, pyro- 

 phosphoric, orthophosphoric acids; tests for them Ions of 

 phosphoric acid and its salts Hydrogen phosphide Phos- 

 phorus tri- and pentachloride 219-229 



18. Chlorine. 



Halogens Occurrence in nature, preparation, and proper- 

 ties of chlorine Chlorine water Hydrochloric acid ; tests for 

 it Nitrohydrochloric acid Compounds of chlorine with oxy- 

 gen Hypochlorous acid Hypochlorites Solution of chlor- 

 inated soda Chloric acid ; tests for it Perchloric acid . . . 230-238 



19. Bromine. Iodine. Fluorine. 



Bromine Hydrobromic acid Tests for bromides Hypo- 

 bromous and bromic acid Iodine Hydriodic acid Tests for 

 iodine and iodides lodic acid Sulphur iodide Compounds 

 of iodine with bromine and chlorine Compounds of nitrogen 

 with halogens Fluorine Hydrofluoric acid 239-245 



