Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: upon the process of titration. A volumetric separation is therefore a much easier process than a gravimetric separation. In systematising the volumetric methods of separation —which systematising forms the peculiar feature of this work—I have availed myself of the rich literature of volumetric analysis. Inasmuch as I desired to reduce the titration methods to a complete system of analysis, independent of gravimetric methods, I have divided this work into three main parts—methods for volumetric estimation, methods for separation, and technical analyses. Many new methods are added to those in general use. Volumetric methods must not only yield accurate results when the reactions are stated in chemical equations ; the actual processes of measurement must be accurately carried out. Just as the exact determination of the weights, and the delicacy of the balance employed by the gravimetric analyst, are of the utmost importance, so is it essential that the volumetric analyst should provide himself with accurate measuring vessels (burettes and pipettes), and properly-graduated titration liquids, and that he should employ due quantities of these liquids in every analysis. It is evident that the measurements will be more accurate, and the results therefore more reliable/the greater the volume of liquid to be measured. For this reason I have devoted a special chapter to a consideration of the methods of measurement and of titration, and I must beg the especial attention of the student to the contents of that chapter, inasmuch as the fundamental considerations which hold good in all processes of titration are there laid down. The methods of separation of the metals are divided into two sections, " group-separations" and " estimations without group-separations." Both sections presu...