cover image: Journal of the Indian Chemical Society  March  1935

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20.500.12592/tz3tdf

Journal of the Indian Chemical Society March 1935

1935

COMPOSITION OF PRUSSIAN AND TURNBULL' S BLUES 145 It is known quantitatively that in the case of solutions the fractions dl II of the intensity of light absorbed by the solution is proportional to its thickness or the number of dissolved molecules i.e.—di II= Ki.c.dD where D is the finite thickness of the layer and c the concentration of the solution. [...] The time of exposure for the solvent was therefore allowed one tenth of that of the solution so that the point where equal intensities would appear on the spectra of the solvent and solution it became evident that the intensity of light through the solution had been weakened to one-tenth and hence the formula K=cD could be applied to evaluate the results under correct condtions. [...] The shift of the absorption bands may be due to (i) the different proportion of Prussian and Turnbuil's blues formed in course of the reaction between the reactants iron and ferrocyanogen salts and (ii) also due to the difference in the size of the particles of Prussian and Turnbull's blues when they are freshly precipitated. [...] In these exothermal photochemical reactions the activation of the reacting molecules or their atomisation and the loosening of the binding forces of the molecules are produced by the absorbed light and the energy liberated in the chemical changes. [...] It is of interest to note that in the dark reaction in presence of an excess of potassium oxalate the rate of disappearance of iodine follows the unimolecular formula but in presence of ultraviolet visible or infra-red radiations the velocity of the disappearence of iodine is semimolecular.
technology medicine science
Pages
79
Published in
India
SARF Document ID
sarf.120026
Segment Pages Author Actions
Frontmatter
i-iv J.C. Ghosh, A.C. Sircar view
Composition of Prussian and Turnbull’s Blues. Part III
143-151 Abani Bhattaciiarya view
Photochemical Reaction between Iodine and Oxalate
151-160 N.R. Dhar, A.K. Bhattacharya, B.L. Murerji view
The Dissociation Constant of Eugenol
161-163 Gadiyara Rao view
Adsorption Indicator in the Volumetric Estimation of Sulphates. a Colloidochemical Study
164-167 M.P. Iyer view
The Chemistry of Jute-lignin. Part VI. Isolated Lignin and Lignin Native in Jute
168-172 Pulin Sarkar view
A Note on the Photochemical Reaction between Ethylene Iodide and Iodine in Carbon Tetrachloride Solution
173-176 D.S. Narayanmurti view
On the Measurement of the Absolute Rates ofMigration of Ions by the Method of Moving Boundaries. Part I
177-189 Jnanendranath Mueherjee, Ramprasad Mitra, Anil Bhattaciiaryya view
Magnetic Susceptibilities of Cobaltic Salts and the Nature of the Cobaltic Ion
190-193 Priyadaranjan Ray, Dines Sen view
The Complex Formation between Manganese or Aluminium with Tartaric Acid in Alkaline Medium
193-196 S.Y. Govel, B.L. Vaisnya view
A Simple Apparatus for Fractional Solidification
197-197 R. Padmanabhan view
Use of Yanadous Sulphate as a Reducing Agent.Part. I
198-203 Pares Banerjee view
Volumetric Estimation of Chlorides and Sulphates in a Mixture Containing both with the Help of an Adsorption Indicator
204-207 M.B. Bane, K.R. Apte view
Review
208-209 unknown view
Backmatter
i-vi unknown view

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