Table 183 215 



DIFFUSION OF AN AQUEOUS SOLUTION INTO PURE WATER 



If k is the coefficient of diffusion, dS the amount of the substance which passes in the time dt, 

 at the place x, through q sq. cm of a diffusion cylinder under the influence of a drop of concen- 

 tration dc I dx, then j. 



dS = — kq ~ dt. 

 dx 



k depends on the temperature and the concentration. 

 The unit of time is a day. 



c gives the gram-molecules per liter. 



Substance. 



Bromine . 

 Chlorine . 

 Copper sulphate 

 Glycerine 

 Hydrochloric acid 

 Iodine 

 Nitric acid 

 Potassium chloride 



" hydroxide 

 Silver nitrate . 

 Sodium chloride 

 Urea 



Acetic acid 

 Barium chloride 

 Glycerine 

 Sodium actetate 



" chloride 

 Urea 



Acetic acid 

 Ammonia 

 Formic acid 

 Glycerine 

 Hydrochloric acid 

 Magnesium sulphate 

 Potassium bromide 

 " hydroxide 

 Sodium chloride 



" hydroxide 



" iodide 

 Sugar 



Sulphuric acid 

 Zinc sulphate . 

 Acetic acid 

 Calcium chloride 

 Cadmium sulphate 

 Hydrochloric acid 

 Sodium iodide 

 Sulphuric acid 

 Zinc acetate 



Acetic acid 

 Potassium carbonate 

 " hydroxide 

 Acetic acid 

 Potassium chloride . 



12. 



'5-° 

 14.8 



13-5 

 8. 



10. 1 

 12. 

 15.0 

 14.8 

 12. 



i5- 2 3 

 12. 

 10.14 

 12. 



7- 

 10. 

 12. 

 150 



'4-3 



12. 



10. 



12. 



12. 



14.8 



12 

 10. 

 I9.O4 

 12. 

 IO. 

 12. 

 18.O5 

 O.O4 

 3-0 12. 

 " I IO. 

 " I 12. 

 4.0 , 12. 



" 10. 



0.8 

 1.22 



o-39 



o-357 



2.21 



(0.5) 

 2.07 

 1.38 

 1.72 

 0.985 

 0.94 

 0.97 

 0.77 

 0.66 



3-55 

 0.67 



0.94 



0.969 



0.74 



1.54 



0.97 



o-339 



2.09 



0.30 



i'3 

 1.72 

 0.94 

 0.964 



1.1 1 

 0.80 

 0.254 



1. 12 

 0.236 

 0.69 

 0.68 

 0.246 



2.21 

 O.9O 



1. 16 



0.2I0 



0.120 



068 



O.60 



I.89 

 O.66 



1.27 



Substance. 



Calcium chloride 

 Copper sulphate 

 Glycerine 

 Hydrochloric acid 



Magnesium sulphate 



(I u 



Potassium hydroxid 

 " nitrate 



" sulphate 



Silver nitrate . 

 Sodium chloride 



« X 



Sulphuric acid 



t° 



0.864 

 1.22 



0.060 

 0.047 



i-95 



0.95 

 0.30 

 0.005 

 2/8 

 6/8 

 10/8 

 M/8 

 4.52 

 3.16 

 0-945 

 0.387 

 0.250 

 2.18 

 0.541 



3-?3 



0.402 



0.75 



0.49 



o-375 



3-9 



1.4 



o-3 

 0.02 



°-95 



0.28 

 0.05 

 0.02 



3-9 



0.9 

 0.02 

 2/8 

 4/8 

 6/8 

 10/8 

 1 4/ 8 

 9-85 

 4-85 

 2.85 

 0.85 



o-35 

 0.005 



0.14 

 0.14 

 0.14 

 0.14 



i-5 



1. 



1. 

 1. 

 1. 



5-5 

 5-5 

 o- 

 o. 



7.6 

 7.6 

 7.6 

 7-6 

 9.6 

 9.6 

 9.6 

 9.6 

 2. 



4-33 

 4-33 

 4-33 

 4-33 

 4-33 



0.70 

 0.72 

 0.64 

 0.68 

 0.23 

 0.26 



033 

 0.47 



0-354 

 o-345 

 0.329 

 0.300 



2-93 

 2.67 

 2.12 

 2.02 

 1.84 

 0.28 

 0.32 

 0.27 



0.34 

 1.72 

 1.70 

 1.70 

 0.89 

 1. 10 

 1.26 

 1.28 



o.79 

 0.86 



0.97 

 1. 01 



o-535 

 0.88 



i-°35 



1.013 



0.996 



0.980 



0.948 



0.917 



2.36 



1.90 



1.60 



i-34 



1-32 



1.30 



1 Euler, Wied. Ann. 63, 1897. 



2 Thovert, C. R. 133, 1901 ; 134, 1902. 



3 Heimbrodt, Diss. Leipzig, 1903. 



4 Scheffer, Chem. Ber. 15, 1882; 16, 1883; 



Zeitschr. Phys Chem." 2, 1888. 



5 Kavvalki, Wied. Ann. 52, 1894; 59, 189 



6 Arrhenius. Zeitschr. Phys. Chem. 10, i£ 



7 Abegg, Zeitschr. Phys. Chem. II, 1893. 



8 Schuhmeister, Wien. Ber. 79 (2), 1879. 



9 Seitz, Wied. Ann. 64, 1898. 



Compiled from Landolt-Bornstein-Meyerhoffer's Physikalisch-chemische Tabellen 

 Smithsonian Tables, 



