Publisher's Synopsis
Excerpt from A Course of Instruction in the Qualitative Chemical Analysis of Inorganic Substances
The Course of Instruction includes two sections - one entitled Labora tory Experiments, giving the directions for the laboratory work; and the other entitled Questions on the Experiments, consisting of a series of ques tions to be studied in'connection with the class-room exercises.
The laboratory work described in the section on Laboratory Experiments is from beginning to end closely correlated with the systematic scheme of analysis. For experience has convinced the author that the plan followed in many text-books of requiring the student to study the separate reactions characteristic of the various elements before undertaking their systematic separation is highly unsatisfactory. However valuable the knowledge of the additional reactions might be, it is found in practice that the perform ance of so large a number of independent, disconnected experiments makes little impression on the student's mind and fails to awaken his interest in the subject. Qualitative analysis affords an efiective means of teaching a part of inorganic chemistry chie?y because it unites into a connected whole a great variety of isolated facts, and because the student sees a practical use of the information presented to him; but these advantages evidently do not apply to facts not directly related to the process of analysis.
The Questions on the Experiments do not in general include such purely informational questions as are immediately suggested by the Notes on the Procedures. They are mainly intended to assist the instructor in training his students more fully in the general principles involved and in enabling them to derive from the subject the mental training it is capable of afford ing. They are in large part of such a character that, in order to answer them properly, the student must not only carefully study the Notes on the Procedures, but must also do independent thinking. It is assumed in these questions, as well as in the Notes on the Procedures, that the student has previously acquired, in his course on Inorganic Chemistry, a general knowl edge oi the mass - action law and of the chemical aspects of the ionic theory. To what extent the instructor will make use of the Questions will depend on the time available for the course and on the maturity of his students.
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