CONTENTS. 



XI 



V. 

 ANALYTICAL CHEMISTRY. 



J'AGB 



32. Introductory remarks and preliminary examination. 



General remarks Apparatus needed for qualitative analysis 

 Eeagents needed General mode of proceeding in qualitative 

 analysis Use of reagents Preliminary examination Physical 

 properties Action on litmus Heating on platinum-foil Heating 

 on charcoal alone and mixed with sodium carbonate Flame-tests 

 Colored borax-heads Liquefaction of solid substances Table I : 

 Preliminary examination ........ 199-209 



33. Separation of metals in different groups. 



General remarks Group-reagents Acidifying the solution 

 Addition of hydrosulphuric acid Separation of the metals of the 

 arsenic group from those of the lead group Addition of ammo- 

 nium sulphide and ammonium carbonate Table II : Separation 

 of metals in different groups ....... 209-214 



34. Separation of the metals of each group. 



Table III : Treatment of the precipitate formed by hydro- 

 chloric acid Treatment of the precipitate formed by hydrosul- 

 phuric acid Table IV : Treatment of that portion of the hydro- 

 sulphuric acid precipitate which is insoluble in ammonium sul- 

 phide Table V : Treatment of that portion of the hydrosulphuric 

 acid precipitate which is soluble in ammonium sulphide Table 

 VI : Treatment of the precipitate formed by ammonium hydrate 

 and sulphide Table VII : Treatment of the precipitate formed 

 by ammonium carbonate Table VIII : Detection of the alkalies 

 and of magnesia .......... 214-219 



35. Detection of acids. 



General remarks Detection of acids by means of the action of 

 strong sulphuric acid Table IX : Preliminary examination for 

 acids Detection of acids by means of reagents added to their 

 neutral or acid solution Table X : Detection of the more impor- 

 tant acids by means of reagents added to the solution Table XI : 

 Systematically arranged table, showing the solubility and insolu- 

 bility of inorganic salts and oxides ...... 220-226 



36. Detection of impurities in officinal inorganic chemi- 



cal preparations. 



General remarks Examination of sulphuric, sulphurous, nitric, 

 phosphoric, and hydrochloric acids Examination of the com- 

 pounds of potassium, sodium, ammonium, calcium, magnesium, 

 aluminium, iron, zinc, manganese, chromium, lead, copper, bis- 

 muth, silver, mercury, arsenic, and antimony .... 226-235 



