Practical physical chemistry

352 Pages·1915·30.94 MB·English

by  Alexander Findlay

DLAY

PRACTICAL PHYSICAL CHEMISTRY
BY THE SAME AUTHOR
THE PHASE RULE AND ITS
APPLICATIONS.
With 134 Figures in the Text. Crown Svo,
6j. net.
{Text-BooksofPhysicalChemistry.')
PHYSICAL CHEMISTRY AND ITS
APPLICATIONS IN MEDICAL
AND BIOLOGICAL SCIENCE.
Svo, 2s. net.
OSMOTIC PRESSURE.
With 2 Figures in theText. Svo, 2s.6d. net.
(Monographson InorganicandPhysical
Chemistry.)
LONGMANS, GREEX & CO.
LONDON,NEWYORK,BOMBAY,CALCUTTA,AND MADRAS
PRACTICAL
PHYSICAL CHEMISTRY
BY
ALEX. FINDLAY, M.A., PH.D., D.Sc.
PROFESSOR OF CHEMISTRY AND DIRECTOR OF THE EDWARD DAVIES CHEMICAL
LABORATORIES, UNIVERSITY COLLEGE OF WALES, ABERYSTWYTH
WITH ONE HUNDRED AND FOUR FIGURES IN THE TEXT
NEW IMPRESSION
LONGMANS, GREEN AND CO
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PREFACE TO THE THIRD EDITION
WHILE maintaining the essential character of the book as
that of a guide to the more fundamental practical methods
and experimental foundations of Physical Chemistry, for the
use of the general student of Chemistry, the attempt has
been made to extend the limits of the work so as to make
it ofservice also to the increasingly large number of students
who now devote themselves more especially to this branch
of science. Several fresh subjects of study and new experi-
mental methods have therefore been added, such as the
determination ofvapour densities bythe methods of Blackman
and of Menzies, and the application of vapour density deter-
minations to the analysis of binary mixtures of normal liquids
(Chap. III.) ; the electrical heating and control of thermostats
(Chap. IV.); the measurement ofsurface tension by the drop
method (Chap. V.); the determination of the molar weight of
dissolved substances by measurements of the vapour pressure
(Chap. VII.) ; the determination of the solubility of sparingly
soluble salts and of the hydrolysis of salts by conductivity
measurements (Chap. IX.); the measurement of decom-
position and of ionic discharge potentials (Chap. XL); and
the solubility of gases in liquids and of liquids in liquids
(Chap. XIV.).
Owing to the larger amount of time which is now
.
vi PREFACE TO THE THIRD EDITION
frequently devoted to practical physical chemistry, I have, in
recent years, felt the necessity ofreferring the more advanced
students to the original literature for the purpose not only
of providing further experimental practice, but also, more
especially, of enabling them to obtain a fuller knowledge
of the precautions to be observed in accurate work, and of
the degree of accuracy obtainable with a given piece of
apparatus. I have, in consequence, added to most of the
chapters a number ofreferences to the literature which must
not, however, be regarded as in any way exhaustive by
means ofwhich the experiments and discussions given in the
following pages, may be supplemented.
An Appendix has also been added giving tables of some
of the more important physical data, so far as they are
required in connection with the course of practical work given
here. For further datareference maybe made to theexcellent
and convenient set ofPhysical Tables compiled by Kaye and
Laby, or to the much larger Tables of Castell Evans or of
Landolt-Bornstein-Meyerhoffer, and the Annual Tables of
Data, Physical, Chemical and Technological, now published.
A. F.
August, 1914.