SOLUBILITY AND POLARITY 
137 
TABLE I 
Sol. in ccs. 
1.83 Isoamyl Alcohol — CsHuOH — 
1.85 Isobutyl Alcohol — C 4 H 9 OH — 
2.49 Propyl Alcohol — C 3 ILOH — 
2.70 Ethyl Alcohol — C 2 H 5 OH — 
3.83 Methyl Alcohol — CHsOH — 
-,C- 
1111 
-C-C-C-C-O- 
1111 
1 
-c- 
111 
-C-C-C-O- 
111 
111 
-C-C-C-O- 
1 1 1 
1 1 
-C-C-O.- 
1 1 
-c-o- 
1 
It may be noted here that the solubility of C0 2 in these alcohols 
increases as their association or polarity factor increases, for it is 
generally known that polarity increases as we go down the column. 
C0 2 is considered a polar substance and it is here shown to be 
more soluble in polar solvents than in non-polar solvents. The 
first two alcohols above tabulated are iso-compounds and hence 
decidedly non-polar, and it will be noticed that the solubility of 
C0 2 in them is low. 
In Table II we have a similar list leading to the same conclusion. 
TABLE II 
Sol. in ccs . 
3.47 Butyric Acid — CiHsOa — 
4.07 Propionic Acid — CsHeC^ — 
111 // 
_C-C-C-C 
1 1 1 \ 
-C-C-C-O- 
1 1 
1 
4.67 Acetic Acid — C 2 H 4 O 2 — -C-C 
1 v o 
\ 
These solvents are somewhat similar in structure but we know that 
acetic acid is strongly polar and we also note that C0 2 is more 
soluble in it than in either of the other two solvents. 
In the case of Propionic acid (C 3 H 6 0 2 ) and Methyl acetate 
(C 3 H 6 0 2 ) (two substances having identical molecular weight) we 
