Freezing-points, Boiling-points^ and Solubilities. 415 



Table IV. — Solubilities calculated from Boiling-points 



M 

 and q, T y// , or from g, ^ , T y// . 



5on'c JLczW, B(OH) s . 



(^) , Csol. (A') 



S (C, l )h. V . ~ lgC so l = 



-? /I 1 -x T"-T' -? s\ 1 >. M 

 2 x 2-3026 VT* ~ T i;/> ) " lg T /;/ - T ' 2 X 23026 VT g ~ T„, ) +lg ( - 1 -'" ~ T ° ) +lg 5-2 



5400x2-3 0-98 



M , 62 



lg^ = lg5T 2 



Calculated. Observed. 

 Cioo =26-23 instead of 34 ! 

 Cso =17-41 „ 16-8 

 Ceo =10-90 „ 11-0 

 C 5 o = 8-55 „ 9-8 

 C 4 o = 6-55 „ 7-0 

 B 20 = 3-64 „ 4-0 

 Cio = 2-92 „ 2-9 

 Co = 1-83 „ 1-9 



lgCiuu - 2x373x375-3x2-3026 ~ lg 2-3 



+ lg 12-19 



Between Calc. Obs. 

 102°-3 and 100° : Cioo=27'34 instead of 34 ! 

 „ 80° : Cso =18-16 „ 16-8 

 „ 60°: Ceo =11-38 „ 11-0 

 „ 50° : Cso = 8-93 „ 9-8 

 „ 40° : C40 = 6-84 „ 70 

 „ 20° : C20 = 3-79 „ 4-0 

 „ 10° : Cio = 305 „ 2-9 

 „ 0°: Co = 1-91 „ 1-9 



Potassium Chlorate, OlOoK. 



(•») 



le 



C sol. 



(c 4J )b. P : 



2X*„ 



X 2-3026 



fe-T-)-^ 



(T,„- 





lor Cl00 = 



-10000x5-0 



2 X 1*53 X 373 x 378 x 2-3026 



Calculated 



0-5x1-53 

 g 5-0x1-812 



+ lg 



Between 105° and 100° 

 80° 

 70° 

 50° 

 40° 



Cioo=68-48 

 Cso =41-68 

 C70 =31-82 

 C50 =17-15 



C40 =12-78 

 20°: C20 = 6-26 

 0°: Co = 2-77 



(T"-T ')=0°-5. (C„) b.p.=6°-5. 



Observed. 



n stead of 56*0 ! 



390 



320 



19-5 



14-4 



7-2 



3-3 



, =1-812. 



If i sol. = 1*53, i. e. taken as a constant for the whole solubility curve 

 and = to i ul at 105°. 

 T,„ = 105° 4-273°. 



<*') 



Cioo = 



Cso = 



C70 = 



C50 = 



C40 = 



C 20 = 



Co = 

 = 1-812. 



Calculated. 



68*71 instead 



43-09 



33-21 



1842 



13-83 



717 



3-48 



Observed. 



of 56-0! 



39-0 



320 



195 



144 



7-2 



3-3 



(T"-T'o)=0°-5. *„'•= 1-812. (CJb.p. = 6°-5. 1^ = 105^4-278°. 



i sol. is taken as the average of i Ul =-l"53 at 105°, and the /sol. of the other 

 limiting temperature (100°, 80°, 70°, 50°, 40?, 20°, 10°); »=1*54, 1'59, 1-60, 

 1-62, 1*66, T70. This mode of calculation is done after the results have been 

 calculated by means of the formula B, i. e. the values of C sol, very nearly found . 



