Partition coeff

Solid Sorbent (e.g. soil sediment, particles) Kpps/H Kp = partition coeff. (L/kg) Pg = density (kg/L)... 

Dye structure Substituent (R) Partition coeff. Satn. Value(mol/kg)... 

The partition coeff. rises from20 0 at 0° to 305 at 28 6°, and to 35 2 at 57 5°. The hydrolysis attains a maximum at about 90°. Hydrochloric and hypochlorous acids are inappreciably soluble in the carbon tetrachloride and the proof that the molecules of chlorine dissolved in the carbon tetrachloride are present as Cl2 molecules turns on the fact that the partition coeff. of chlorine between chlorine gas and carbon tetrachloride is constant in accord with Henry s law. Thus, representing concentrations in milligram-molecules per litre ... 

The mean value of the partition coeff. is therefore 0 012. Hence, the chlorine in soln. has the same molecular state as chlorine gas. These observations also show that the solubility of chlorine in water does not follow Henry s /aw if the total chlorine in soln. be considered, because only that portion of the chlorine which is not hydrolyzed is partitioned between the liquid and the space above. If allowance be made for this, the partition coeff. between chlorine water and air is 20x0 012 =0 24. Chlorineg as at one atm. press, contains mol. per litre hence, if the partition coeff. be 0 24, a litre of chlorine water in equilibrium with chlorine gas at one atm. press, and at 0° will contain 4X0 4=0 186 mol. per litre, or 1 32 gnns. of free chlorine and 146 grms. of hydrolyzed chlorine per 100 c.c. The solubility of chlorine in water is 0 089 mol. per litre, and of this 0 025 mol. is hydrolyzed. At 25°, there will be 0 081 mol. of non-hydrolyzed chlorine per litre. 

The partition coeff. of bromine between water and carbon tetrachloride, is so... 

A. A. Noyes 5 to the belief that the number of molecules in the soln. is not changed by the addition of more iodine because polyiodides are formed MI+mI2=MI2 +i. Y. Osaka showed that the rise of the f.p. which occurs when iodine is added to hydriodic acid or to aq. soln. of potassium iodide is proportional to the amount of iodine added, and is greater for hydriodic acid than for the potassium salt. Hence, the total concentration of the ions and of unionized molecules is decreased by the addition of iodine. A. A. Jakowkin inferred from the partition coeff. of iodine in dil. soln. that potassium tri-iodide was formed, and that with more cone. soln. still more complex polyiodides are produced. Still further, the change in the partition coeff. of iodine between aq. soln. of potassium iodide and nitrobenzene led H. M. Dawson and R. Gawler to infer that polyiodides as high as potassium ennea-iodide, KI9, are probably present in soln., although no such compound has been obtained in the solid state. H. L. Wells and H. L. Wheeler and others, however, have prepared several solid alkali polyiodides for example ... 

According to F. C. Franklin and C. A. Kraus,40 liquid ammonia readily dissolves sodium and potassium iodides. The partial press, of ammonia in soln. of potassium iodide at 25°, as measured by R. Abegg and H. Riesenfeld, is raised from 13 45 mm. of water to 13 28, and 14 88 mm. for 0 5W-, N-, and l 5Ar-soln. respectively. H. M. Dawson and J. McCrae have shown that the distribution of ammonia between water and chloroform is generally lowered by the addition of various salts of the alkali metals and ammonium which they tried—halides, nitrates, chlorates, oxalates, sulphates, carbonates, hydroxides this means that the solvent power of aq. soln. of the alkali salts is in general less than that of pure water—lithium chloride, ammonium bromide, and sodium iodide act in the opposite way. The other halide salts of lithium were not tried. The change produced in the partition coeff. by the halides, at 20°, is as follows ... 

DOC partition coeff, lake water, simulated lake water, Aldrich humic acid, Servos Muir 1989a)... 

Material t= 5 C Salt Cone n [Pg.103]

Source Calculated bulk partition coeff. for mineral ... 

Residue Transfer energy (kJ/mol) Hydra- tion. (kJ/mol) Partition coeff. (kJ/mol) Hydro- pathy index" Memb.- buried prefer. Consen. scale Access. Surface (Ab Buried residues % mole/ ... 

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