A Handbook of Chemical Analysis: Adapted to the Unitary Notation (Classic Reprint)

Excerpt from A Handbook of Chemical Analysis: Adapted to the Unitary Notation

By means of reagents the chemist puts questions to the sub stance under examination, inquiring whether it contains this or that group of similar elements, or only this or that member of such groups. The answers to these questions are afforded by the occurrence or non-occurrence of the consequent reactions. If the question be put correctly, i. E. If all the conditions under which the reaction expected can be produced by the reagent employed be carefully observed, the answer is decisive as to the presence or absence of the element, or group of elements, sought; if, on the other hand, these conditions, i. E. The properties and chemical relations of the bodies formed by the chemical changes which constitute the reaction, have been wholly or partially neglected, the answer, if not certainly erroneous, is at least doubtful.

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