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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. 1914 edition. Excerpt: ...case of sucrose solutions that none of the current formulae was valid over a wide range of concentration and put forward the equation V rj = Aw i where v is the volume of sucrose and w that of water in unit volume of solution. Kendall again suggested a logarithmic expression, log--= x log A V. which is the Arrhenius formula modified by substituting molecular concentration of solute in a fixed weight of solvent. Two illustrations of the application of this expression may be given. TABLE XXXV.--The Octyl Hydrogen Phthalates (r, d And I) In Benzene AT 25. (DUNSTAN AND THOLE'S DATA.) TABLE XXXVI.--Sucrose In Water At 25 C. (green's Data.) The constancy of the value of A shows that the formula holds satisfactorily throughout the whole range of concentration even when the viscosity of the solution is more than one hundred times greater than that of water. Quite recently Dolezalek and Schulze,127 investigating the system ether-chloroform, have shown that the equilibrium C4H10O + CHC1 3 C4H10O. CHC13 is established and that the percentage amount of the compound can be calculated by the application of the law of mass action. The viscosities of the various mixtures of ether and chloroform which vary very considerably from those calculated by the mixture law are shown to agree excellently with those calculated on the supposition that each mixture contains an amount of the compound determined by the above considerations. Viscosity Maxima and their Interpretation.--Having dealt with the viscosity concentration curves which belong to Type 1, it is now necessary to discuss the very important cases in which maxima appear. Based on the view that associated liquids in general, and hydroxylated liquids in particular have a relatively high viscosity coefficient, the...
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