ON

QUALITATIVE ANALYSIS.

BY

HENRY B. HILL, A.M.,

Assistant Professor of Chemistry in Harvard University.

NEW YORK:

G. P. PUTNAM'S SONS.

1874.

PREFACE.

ALTHOUGH the advantages to be gained by teaching qualitative analysis by lecture are sufficiently obvious, it is a serious disadvantage to the student that the necessity of taking proper notes often prevents him from seeing what takes place upon the lecture table. This little book was intended to give concisely the most important facts essential to intelligent work in the laboratory, and thus give the student more leisure for observation in the lecture room.

A comparative description of those compounds of bases and acids which are commonly found or used in analysis is first given, and afterwards a method of separation which experience has proved to be sufficiently simple and accurate, is briefly explained. This method of procedure from the properties of compounds to the methods of separation will also serve to show the way in which the more difficult problems of analysis must be solved.

No tables for analysis have been given, since their use is of questionable advisability, and, if used, are much better drawn up by the student himself.

Symbols have been used throughout for reagents for the sake of brevity, those used in solution being distinguished by the addition of "Aq."

For the sake of simplicity, water has often been omitted from the formulæ of compounds, inasmuch as the number of molecules of water