Freezing-points, Boiling-points, and Solubilities. 41^ 



Table III. — Solubilities calculated from Freezing -points 



M 



and g, T /5 or from q, j— , T ; . 



Boric Acid, B(OH) ;! . 



U) . (C) sol. ! (A') 



lg Cfr.p. - lg(0)soi.= 



q (I K T"f 1M ,-T £ fl 1) |MT 

 2x2-3026 VT,~~T, J ~ lg T,-T ~2x2-3026VT s r/ +1 «* J : , 



M 



-TJ+lg^ 



5400x0-585 0-318 



, M 62 , 

 lg l8-7 = 18-7 =lg 



Calculated. 

 Co =1-98 instead o 

 Cio = 2-81 

 O 20 = 3-89 

 C40 = 7-01 

 O 50 = 9-16 

 Cso =18-63 

 Cioo=28 03 



3-315 



gCo_ 2 X 273 X 272-41 5 x 2-3026 ~ lg 0-585 



4-lg 1-024 

 Between Cede. Obs. 



—0*585 and 0° : Co = 1*92 instead of 19 

 „ „ 10° : Cjo = 2-79 „ 2-9 

 „ „ 20° : C 2 o = 3-86 „ 4-0 

 „ „ 40° : C 4 o = 6-95 „ 7-0 

 ., „ 50° : C50 = 9-09 „ 9-8 

 „ „ 80°: Cso =18-04 „ 16-8 

 „ ,,100°: Oioo = 27-8 „ 34! 



Observed. 



f 1-9 



2«9 



40 



70 



9-8 



16-8 



34-0! 



(•») 



Potassium Chlorate, C10 3 K. 



1 (C)sol. _ q (I 1\ (T"fr.p. 



ig C fr.p. - ~ 2 x i X 2-3026 VT, ~ T~J g 



•To) i, 



(T ( -T )(i) 



10000x0-797 0408x1-70 



lg U ~ 2 X 1:70 X 272-203 x : 273x2-3026 ~ lg : 797x 1*765 + g L 0dw 



Between -0*797 and 0° 



„ 20° 



» 40°: 



„ 50° 



„ 70° : 



„ 80° 



„ 100° 



Calcidated. Observed 



Co = 3-21 instead of 3*3 

 C20 



6-51 

 C40 =12-17 

 C50 =17-01 

 C70 =28-90 



Cso =3685 

 Cioo=57'61 



If i t is assumed to remain, as at 0° for solubility, 



7-2 

 14-4 

 19-5 

 32-0 

 39-0 

 560 



1'70 for all temperatures. 



Calculated. 



(£') 



Co = 

 C20 = 

 C 4 o = 

 C50 = 



C70 = 



Cso = 

 Cioo= 



3-21 

 6-63 

 13-23 

 1814 

 31-84 

 41-35 

 69-85 



instead of 



Observed. 



3-3 



7-2 

 14-4 

 19-5 

 32-0 

 390 

 560 ! ! 



If /\ is taken as the average of the i'a belonging to the two limits of tempe- 

 rature (/. e. to T, and to 0°, 20°, 40°, 50°, 70°, 80°, 100°). After (O)sol. i* 

 calculated by the formula B, the (C)sol. are very approximately known, and 

 the fc/s belonging to the (C) sol. at the given temperature can be well estimated, 

 when the is obtained from freezing-points and boiling-points are known. In 

 this way the results obtained for the solubilities become more accurate. 



