Preparation  of  Permanganate  Solutions.  { Amj/a°yurj9^ 
Table  I. 
Permanency  of  Permanganate  Solutions,  Etc. 
Required  for  Def- 
Age ot 
inite  Volume  Ox- 
No. 
Solution. 
Solution. 
alic  Acid. 
I.  i 
Y/ioo  potassium  permanganate  , 
  10  days 
20.14 
25  days 
20.20 
148  days 
20.62 
185  days 
20.65 
386  days 
2I.05 
2. 
A/775  potassium  permanganate 
2  days 
11.88 
5  days 
12.04 
15  days  ' 
12.15 
2. 
  2  days 
1 1. 8l 
223  days 
11.99 
3- 
AV50  potassium  permanganate  . 
8.14 
6  days 
8.17 
19  days 
8.25 
47  days 
8.31 
68  days 
8.45 
125  days 
8.50 
180  days 
8-55 
4- 
AV80  potassium  permanganate 
(by  direct 
dilution  of  AVio)   
  theoretical 
1370 
i*>  minutes 
14.20 
'  5- 
AV100  potassium  permanganate 
(by  direct 
dilution  of  N/10)   
  Theoretical 
17-50 
15  minutes 
17.83 
6. 
Same  as  Sol.  5   
  Theoretical 
17-50 
15  minutes 
17.81 
7- 
17-43 
15  minutes 
17.69 
1  day 
17.77 
2  days 
18.18 
8. 
Oxalic  acid  0.1101  Gm./ioo  C.C.  (0.0175 
  1  hour 
20.62 
18  days 
20.58 
22  days 
20.47 
72  days 
18.06 
9- 
Oxalic  acid,  0.1101  Gm./ioo  CC. 
  1  hour 
20.54 
11  days 
20.62 
14  days 
20.62 
10. 
Oxalic  acid,  0.1101  Gm./ioo  CC 
  1  hour 
8.34 
6  clays 
8.32 
10  days 
8.30 
14  days 
8.23 
19  days 
8.27 
