Tables Of Qualitative Analysis For Use Of Students Arranged For The Use Of Students In The Laboratory Of The Technical College Sydney

Excerpt from Tables for Qualitative Chemical Analysis: Arranged for the Use of Students It is, of course, not necessary for every student to work through the reactions for all the substances given in these tables; typical ones can be selected according to circumstances, e.g. the medical student need not necessarily work through the reactions of rare earths. Theory or Qualitative Analysis. - It is assumed that the student will be taught the principles of analysis and how to use these tables, and that he will not be left to struggle through them unaided; it is for this reason and because the book is intended for bench use that equations and the usual more or less lengthy explanations are omitted. The directions arc made as brief as possible, for students when engaged in practical work have usually neither the time nor the inclination to wade through more or less lengthy descriptions of the methods of procedure. In this laboratory the principal explanations are given in the form of leturettes and demonstrations of fifteen or twenty minutes before the practical exercises; the class also meets once a week for one hour's tutorial instruction in the theory of qualitative analysis, chemical equations, calculations and similar matters, and there is a written examination upon the work at the end of the term, as well as practical and theoretical examinations at the end of the year. Weighing and Measuring. - By requiring the student to work throughout with weighed or measured quantities, it is necessary that he should be shown, unless he is already familiar with them, how to use the balance, burette, measuring flasks and pipettes; the small amount of extra time necessary for this will, however, be well spent. The quantity of substance to be examined can either be weighed out separately by each student, or students can take it in turns to weigh out and divide the portions for a group of students. The balance used need not be an expensive one, very good chemical balances, weighing to a milligram, can now be obtained for less than 30/-; if the balance available is not sufficiently sensitive for the smaller weights, larger quantities can be weighed out, placed on glass or glazed paper and divided by a spatula into approximately equal parts, just as powders are sometimes divided by pharmacists; although this would not be quite so satisfactory, it would be a great improvement upon the usual method of shaking an indefinite quantity out of a bottle. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Excerpt from Notes on Qualitative Analysis: Arranged for the Use of Students of the Rensselaer Polytechnic Institute The market is unquestionably much overstocked with books upon this subject, and the author's only excuse for making this addition to the number is that it meets the requirements of his own classes. There is small doubt that, were it not for the expense of printing, every teacher of chemistry would use a textbook made by himself with either pen or scissors, for the sufficient reason that it is more acceptable to both the instructor and the student to use a book from cover to cover, rather than to cut and omit material from a work more voluminous than the class requires. The attempt has been made in these notes to induce the student to make use of works of reference. It is to be regretted that the energies are often bent towards blindly following the words of the text without ever attempting to "read between the lines;" but it is hoped that those who use what is here given may be led so to think for themselves as to create a desire to know rather than an anxiety to pass. Equations should be written under all the paragraphs, and the references should be examined in a most thorough manner. It is the author's practice to hold a daily "quiz-class" upon points of difficulty connected with the laboratory work; and he finds the results most satisfactory when a student is placed in charge of such a class and is required to answer such questions as may be asked by his fellow students. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.