1898-99.] Sulphuric Acid and Sulphates in Solution. 
491 
(b) Sulphuric Acid and Sodium Sulphate. 
One series only was made with, these solutions, viz., a series in 
which the concentration of the acid varied, and that of the 
sulphate was constant. The velocity constants, it will be seen, 
are very similar to those obtained in the first series for solutions 
containing acid potassium sulphate. They are in every case some- 
what higher than the latter. 
I. 
II. 
H 2 S0 4 0-025 normal. 
HoSO. 0‘05 normal. 
Na 2 SO 4 ,0 - l ,, 
Na 2 S0 4 0-1 
t 
x E — X 
7c 
t 
X 
E - x 
7c 
345-5 
106 1825 
7-09 
177 
113 
1785 
15-1 
1354 
381 1550 
7-05 
284 
177 
1721 
15-0 
1824 
492 1439 
7*00 
1202 
645 
1253 
15-0 
2849 
711 1220 
7-00 
1640 
820 
1078 
15-0 
5790 
1167 764 
6-96 
— 
— 
CO 
1898 
— 
15-0 
oo 
1931 — 
7-01 
III. 
IV. 
h 2 so 4 
0'1 normal. 
H 0 S0 4 0-2 normal. 
Na 2 SO, 
i o-i „ 
Na 2 S0 4 0-1 „ 
t 
X 
E-x 
7c 
t 
x E-x 
7c 
107-5 
149 
1779 
32-5 
82 
231 1688 
67-9 
192-5 
260 
1668 
32-7 
140-5 
378 1541 
67*8 
355-5 
444 
1484 
32-0 
227-5 
574 1345 
67-9 
443-5 
544 
1384 
32*5 
391 
878 1041 
67*9 
535 
635 
1293 
32-4 
480 
1017 902 
68-3 
CO 
1928 
_ 
32-4 
oo 
1919 — 
68-0 
Y. 
H 2 S0 4 0‘85 normal. 
Na 2 SO 4 0*l 
t 
X 
E-x 
7c 
67 
170 
805 
124-2 
128-3 
300 
675 
124-5 
220 
457 
518 
124*8 
364 
628 
347 
123*2 
467 
719 
256 
124-4 
oo 
975 

124-5 
