138 
IOWA ACADEMY OF SCIENCE Voi, XXIX, 1922 
find that C0 2 has a solubility of 4.07 ccs. in the former and of 
6.49 ccs. in the latter. This difference seems to be due to the 
greater polarity of Methyl acetate as shown by the structural for- 
mula, which gives to Methyl acetate greater symmetry and hence 
greater polarity. 
Propionic acid — 
Methyl acetate — 
1 1 s? 
C-C-C 
1 1 \ 
i 
C-O-C- 
C0 2 is more soluble in Amyl chlofide than in Amyl bromide, more 
in Ethylene chloride than in Ethylene bromide, and more in Chloro 
benzene than in Bromo benzene — all because the chlorides are 
more polar according to their structure than are the bromides. 
TABLE HI 
11111 
4.12 Amyl acetate — CH 3 COOC 5 Hu --C-C-0-C-C-C-C-C- 
i 11111 
i ^ i 
6.49 Methyl acetate — CH 3 COOCH 3 - -C-C-0-C 
i i 
In Table III the first column represents the solubility of C0 2 
in the solvent shown in the second column. Both solvents are polar 
but Methyl acetate has its poles closer together and hence is more 
strongly polar. C0 2 is more soluble in it than in Amyl acetate and 
this is as it should be according to this theory. 
Ortho-toluidine and meta-toluidine have very nearly the same 
structure. They should therefore show approximately the same 
solubility. For the former 1.38 ccs. represents the solubility, and 
for the latter 1.43 ccs. of C0 2 . This is in accord with the theory. 
Again, the solubility of C0 2 in Acetone (CH 3 COCH 3 ) — 
i ^ i 
-C-C-C- 
1 1 
is 6.29 ccs. and in Methyl acetate (CH 3 COOCH 3 ) — 
O 
i S i 
-C-C-O-C- 
