Colloids And The Ultramicroscope; A Manual Of Colloid Chemistry And Ultramicroscopy

Paperback | February 4, 2012

byRichard Zsigmondy

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909. Excerpt: ... RECAPITULATION The starting point of this book is a fundamental question of colloidal chemistry, viz., the question whether or not the polarized dispersion of light recognizable in hydrosols by the Tyndall test, is one of the essential properties of hydrosols. By means of the method developed by Siedentopf and myself, of rendering visible ultramicroscopic particles, this question could in some cases be decided. In the case of the hydrosols examined, the diffuse dispersion of light has proved to be an essential characteristic; it is caused by the same material particles which give to those fluids their otherwise remarkable properties. The newly developed method for making visible and measuring ultramicroscopic particles, made it possible to obtain a closer insight into the processes and relations in colloidal solutions, hitherto inaccessible to direct observation. Thus by a series of experiments, the size of the particles in colloidal metal solutions was determined. It was shown that in coarser hydrosols the largest particles have a mass corresponding to a linear dimension of about 60-80 fifi (Chapters IX and XIX), but that carefully prepared solutions show an inhomogeneity which is scarcely discernible and hardly to be distinguished from that of many crystalloid solutions; further, that numerous intermediaries exist between these extreme cases (Chapter IX). It was shown that the smaller metal particles in hydrosols possess an extremely active oscillatory and translatory motion, which in many respects differs from the typical Brownian movement (Chapter X). The statement made in conjunction with H. Siedentopf, that in the case of metal subdivisions (in ruby glasses) there is no connection recognizable between the size of the particles and their color, was c...

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909. Excerpt: ... RECAPITULATION The starting point of this book is a fundamental question of colloidal chemistry, viz., the question whether or...

Format:PaperbackDimensions:80 pages, 9.69 × 7.44 × 0.17 inPublished:February 4, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217816932

ISBN - 13:9780217816939

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