X CONTENTS. 



V. 



ANALYTICAL CHEMISTRY. 



PAGE 



34. Introductory remarks and preliminary examination. 



General remarks Apparatus needed for qualitative analysis 

 Reagents needed General mode of proceeding in qualitative 

 analysis Use of reagents Preliminary examination Physi- 

 cal properties Action on litmus Heating on platinum foil 

 Heating on charcoal alone and mixed with sodium carbonate 

 Flame-tests Colored borax-beads Liquefaction of solid 

 substances Table I.: Preliminary examination 371-381 



35. Separation of metals into different groups. 



General remarks Group reagents Acidifying the solution 

 Addition of hydrogen sulphide Separation of the metals of 

 the arsenic group from those of the lead group Addition of 

 ammonium sulphide and ammonium carbonate Table II. : 

 Separation of metals into different groups 382-387 



36. Separation of the metals of each group. 



Table III. : Treatment of the precipitate formed by hydro- 

 chloric acid Treatment of the precipitate formed by hydrogen 

 sulphide Table IV. : Treatment of that portion of the hydro- 

 gen sulphide precipitate which is insoluble in ammonium sul- 

 phide Table V. : Treatment of that portion of hydrogen 

 sulphide precipitate which is soluble in ammonium sulphide 

 Table VI. : Treatment of the precipitate formed by ammo- 

 nium hydroxide and sulphide Table VII. : Treatment of the 

 precipitate formed by ammonium carbonate Table VIII. : 

 Detection of the alkalies and of magnesium 387-390 



37. Detection of acids. 



General remarks Detection of acids by means of the action 

 of strong sulphuric acid Table IX. : Preliminary examina- 

 tion for acids Detection of acids by means of reagents added 

 to their neutral or acid solution Table X. : Detection of the 

 more important acids by means of reagents added to the solu- 

 tion Table XI. : Systematically arranged table, showing the 

 solubility and insolubility of inorganic salts and oxides 

 Table XII. : Table of solubility Special remarks 391-401 



38. Methods for quantitative determinations. 



General remarks Gravimetric methods Volumetric 

 methods Standard solutions Normal solutions Different 

 methods of volumetric determination Indicators and ionic 

 explanation of their action Titration Acidimetry and alka- 

 limetry Normal acid and alkali solution Oxidimetry Po- 

 tassium permanganate and dichromate lodimetry Solutions 

 of iodine, sodium thiosulphate, bromine, silver nitrate, sodium 

 chloride, and potassium sulphocyanate Gas analysis Water 

 analysis 402-432 



