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Elementary qualitative analysis for college students
Oct., I934.]
BOOK REVIEWS.
513
ELEMENTARY QUALITATIVEANALYSISFOR COLLEGESTUDENTS,by J. H. Reedy, Associate Professor of Chemistry in the University of Illinois, 2d edition, 163 pages, tables, 14 )< 21 cms. New York and London, McGraw-Hill Book Company, Inc., I932. Price $I.5O. The second edition of this manual of elementary qualitative analysis for college students retains the general plan and arrangement of the first. The changes consist mainly in the inclusion of new procedures such as the use of perchloric acid as a rapid and safe solvent for the sulfides of the Tin Subgroup; the precipitation of potassium by a concentrated solution of zinc perchlorate; the precipitation of sodimn by the new zinc-uranyl acetate reagent ; and, a new scheme for detecting anions. Essentially the book represents an attempt to put in printed form the system of laboratory and quiz room instruction that has been developed during recent years in the elementary courses in Qualitative Analysis at the University of Illinois. An effort has been made to impress upon the student the realization that every qualitative procedure is based upon some fundamental reaction or particular characteristic of the substance involved. For this reason, theoretical discussions to explain results are g)ven as notes, placed as close to the experimental directions as possible. The procedures in this manual have been chosen with a view to their reliability in the hands of elementary students. T. K. CLEVELAND. ELEMENTARY LABORATORY EXPERIMENTS IN ORGANIC CHEMISTRY, by Roger Adams, Professor of Organic Chemigcry in the University of Illinois, and John R. Johnson, Professor of Organic Chemistry in Cornell University, 363 pages, illustrations, I4.5 X 22.5 cms. New York, The Macmillan Company, I933. Price $I .9o. The structure of this manual reflects accurately the extensive experiences of the authors as teachers of Organic Chemistry. Its thoroughness and its method of approach to a somewhat more than average empirical study places this particular collection of laboratory experiments in Organic Chemistry well in the forefront of manuals of this type. Although designed for beginning students whether specializing in the subject or taken in preparation for medicine, agriculture, home economics, biology or related fields, it covers quite thoroughly the principles of organic synthesis technique. The manual is in two sections, the first of which comprises a series of expert ments on laboratory operations. These include such manipulations as melting point determinations, crystallization, fractional and steam distillation, extraction and the qualitative as well as quantitative determination of elements. The second section deals with the preparation and reactions of typical organic compounds. Directions are furnished for the preparation of over fifty compounds. The choice of compounds was largely influenced by the desire to acquaint the student with the better-known typical reactions in organic syntheses. Not the least useful part of the manual is the Appendix. Herein is found a statement of the approximate time required for each experiment, the physical properties of some organic compounds not listed in the ordinary handbooks, properties of some aqueous solutions and a complete list of the materials and reagents required for the experimenl s. T. K. CLEVELAND,
BOOK REVIEWS.
513
ELEMENTARY QUALITATIVEANALYSISFOR COLLEGESTUDENTS,by J. H. Reedy, Associate Professor of Chemistry in the University of Illinois, 2d edition, 163 pages, tables, 14 )< 21 cms. New York and London, McGraw-Hill Book Company, Inc., I932. Price $I.5O. The second edition of this manual of elementary qualitative analysis for college students retains the general plan and arrangement of the first. The changes consist mainly in the inclusion of new procedures such as the use of perchloric acid as a rapid and safe solvent for the sulfides of the Tin Subgroup; the precipitation of potassium by a concentrated solution of zinc perchlorate; the precipitation of sodimn by the new zinc-uranyl acetate reagent ; and, a new scheme for detecting anions. Essentially the book represents an attempt to put in printed form the system of laboratory and quiz room instruction that has been developed during recent years in the elementary courses in Qualitative Analysis at the University of Illinois. An effort has been made to impress upon the student the realization that every qualitative procedure is based upon some fundamental reaction or particular characteristic of the substance involved. For this reason, theoretical discussions to explain results are g)ven as notes, placed as close to the experimental directions as possible. The procedures in this manual have been chosen with a view to their reliability in the hands of elementary students. T. K. CLEVELAND. ELEMENTARY LABORATORY EXPERIMENTS IN ORGANIC CHEMISTRY, by Roger Adams, Professor of Organic Chemigcry in the University of Illinois, and John R. Johnson, Professor of Organic Chemistry in Cornell University, 363 pages, illustrations, I4.5 X 22.5 cms. New York, The Macmillan Company, I933. Price $I .9o. The structure of this manual reflects accurately the extensive experiences of the authors as teachers of Organic Chemistry. Its thoroughness and its method of approach to a somewhat more than average empirical study places this particular collection of laboratory experiments in Organic Chemistry well in the forefront of manuals of this type. Although designed for beginning students whether specializing in the subject or taken in preparation for medicine, agriculture, home economics, biology or related fields, it covers quite thoroughly the principles of organic synthesis technique. The manual is in two sections, the first of which comprises a series of expert ments on laboratory operations. These include such manipulations as melting point determinations, crystallization, fractional and steam distillation, extraction and the qualitative as well as quantitative determination of elements. The second section deals with the preparation and reactions of typical organic compounds. Directions are furnished for the preparation of over fifty compounds. The choice of compounds was largely influenced by the desire to acquaint the student with the better-known typical reactions in organic syntheses. Not the least useful part of the manual is the Appendix. Herein is found a statement of the approximate time required for each experiment, the physical properties of some organic compounds not listed in the ordinary handbooks, properties of some aqueous solutions and a complete list of the materials and reagents required for the experimenl s. T. K. CLEVELAND,