Apr. 7 ,1985 
Action of Soap upon Lead Arsenates 
91 
Tabi^E I .—Percentage of arsenic made soluble by treatment of lead arsenate paste with 
soap—first series 
Soap. 
Dead arsenate. 
Solu¬ 
tion in 
No. 
Quantity. 
(dry). 
Kind. 
Quantity.' 
Brand. 
AstOs 
in 200 cc. 
As 205 
rendered 
soluble. 
which 
lead 
arsenate 
was 
ground. 
I. 
Gm. 
0. 6 
Sodium stearate.... 
Gm, 
2. 0 
Gm. 
0. 01760 
Per cent. 
50.8 
Water. 
2 . 
1.8 
.do. 
2. 0 
. 01870 
54-0 
Do. 
3 . 
.6 
.do. 
2. 0 
. 01424 
41. I 
Soap. 
4 . 
1.8 
.do. 
2. 0 
. 01704 
49.2 
Do. 
5 . 
.6 
2. 15 
. 00884 
32.7 
Water. 
6. 
1.8 
.do. 
2. 15 
> 
•00573 
19.8 
Do. 
7 . 
.6 
.do. 
2. 15 
1 
. 00670 
23.2 
Soap. 
8. 
1.8 
.do. 
2. 15 
<< /JM 1 
. 00752 
26. 0 
Do. ' 
9 . 
.6 
Sodium oleate. 
2. 0 
•00335 
9-7 
Water. 
10.... 
1.8 
.do. 
2. 0 
. 00817 
23.6 
Do. 
II.... 
.6 
.do. 
2. 0 
. 00251 
7*3 
Soap. 
12... . 
1.8 
.do.. 
2. 0. 
. 00726 
21.0 
Do. 
13 - 
.6 
.do. 
2. IS 
. OOIII 
3-8 
Water. 
14. ... 
1.8 
.do. 
2. 15 
» 
. OOIII 
3-8 
Do. 
15 • • 
.6 
2. 15 
« f 
. 00084 
2.8 
Soap. 
16. ... 
1.8 
.do. 
2. 15 
it t 
. 00084 
2.8 
Do. 
1 Pastes contained: 
“M” “T” 
AS3O5 .17.30 per cent. 13.40 per cent. 
PbO.35.35 per cent. 37.45 per cent. 
Tabi^^ II .—Percentage of arsenic made soluble by treatment of dry lead arsenate with 
soap—second series 
No. 
Soap. 
Dead arsenate.' j 
1 
AsaOs 
in 200 cc. 
AsaOs 
rendered 
soluble. 
Solu¬ 
tion in 
which 
lead 
arsenate 
was 
groimd. 
Quantity 
(dry). 
Kind. 
Quantity. 
Brand. 
Gm, 
Gm. 
Gm. 
Per cent. 
17.... 
0. 6 
Sodium stearate. 
I -35 
0. 01280 
30. I 
Water. 
18.... 
1.8 
.do. 
1-35 
. 02814 
66.2 
Do. 
19.... 
.6 
.do. 
1-35 
• 01325 
31-I 
Soap. 
20.... 
1.8 
.do. 
1-35 
.03097 
72.9 
Do. 
21.... 
.6 
.do. 
I. 20 
. 00625 
20. 2 
Water. 
22.... 
1.8 
.do. 
I. 20 
» 
. 01084 
35-1 
Do. 
23.... 
.6 
.do. 
I. 20 
1 
. 00596 
19-3 
Soap. 
24.... 
1.8 
I. 20 
<< » 
.00893 
28. 9 
Do. 
25.... 
.6 
Sodium oleate. 
1-35 
. 00144 
3-4 
Water. 
26.... 
1.8 
.do. 
1-35 
•00345 
8.1 
Do. 
27.... 
.6 
. do. 
1-35 
. 00144 
3*4 
Soap. 
28.... 
1.8 
.do. 
1-35 
. 00308 
7.2 
Do. 
29.... 
.6 
.do. 
I. 20 
. 00122 
3-9 
Water. 
30.... 
1.8 
.do . 
I. 20 
<c » 
. 00066 
2.1 
Do. 
31.... 
.6 
. do . 
I. 20 
/jp> > 
. 00122 
3-9 
Soap, 
32.... 
1.8 
I. 20 
. 00081 
2. 6 
Do. 
— 
J Dry arsenate contained: 
Moisture.o 0.84 per cent. 
AS2O5.31*50 per cent. 25.75 per cent. 
Dead (PbO). 65.40 per cent. 7310 per cent. 
AssO» soluble in 4 per cent am¬ 
monia... 
8.85 per cent. 
0.82 per cent. 
