9
The results obtained have been set forth in Tables III and IV below: —
TABLE III.
Statement showing the details of the experiments and results obtained with solutions of Bleaching
powder in varying strengths.
(1) Number.
(2)
Line of experiment.
(3)
Distinct-
i v e l e t t e r i n g
of the
series.
(4)
Strength of
solution.
(5)
Details of storing the
s o l u t i o n .
(6)
Results of. titration.
When made
afresh.
After a week.
After 16 days.
I Four solutions of the
strengths noted in
column 4 were made
on 8th July 1919 and
stored in four different
bottles and in four
different ways as
noted in column 5 for
a period of one week
and titrated on the
eighth day.
A
2 5 g r a m - m e s p e r - l i t r e . A-I. 200 c.c. kept closed
in the laboratory.
A-II. 200 c.c. kept open
in the laboratory.
A-III. closed in the
dark room.
A-IV. open in the dark
room.
13.8
per
cent
of
available
chlorine.
13.07 of available
chlorine.
. . .
12.9 of available
chlorine.
. . .
13.07 of available
chlorine.
. . .
12.9 of available
chlorine.
. . .
B
5 0 g r a m -
m e s p e r -
l i t r e . B-I. 200 c.c. kept closed
in the laboratory.
B-II. 200 c.c. kept open
in the laboratory.
B-111. 200 c.c. kept clos-
ed in the dark room
B-IV. 200 c.c. kept open
in the dark room.
13.6
per
cent
of
available
chlorine.
12.04 of available
chlorine.
. . .
D o .
. . .
Do.
. .
Do.
. . .
C
100 gram-
mes. per
litre
C-I. 200 c.c. kept closed 1 1
in the laboratory
C-II. 200 c.c. kept open
in the laboratory.
C-III.c.c. kept clos-
ed in the dark room.
C-IV. 200 c.c. kept open
in the dark room.
13.59
per
cent
of
available
chlorine,
11.78 of available
chlorine.
. . .
Do,
. . .
11.7 of available
chlorine.
. . .
11.78 of available
chlorine.
. . .
D
L
200 gram-
mes Per
litre.
D-I. 200 c.c. kept closed
in the laboratory
D-II. 200 c.c. kept open
in the laboratory.
D-III. 200 c.c. kept clos-
ed in the dark room.
D-IV. 200 c.c. kept open
in the dark room.
13.42
per
cent
of
available
chlorine.
10'67 of available
chlorine.*
. . .
10'32 of available
chlorine.
. . .
10.45 of available
c h l o r i n e . *
. . . .
10.20 of available
c h l o r i n e .
. . .
II Two solutions
of
strengths noted in
column 4 were made
and stored as detailed
in column 5 for 16
days.
I
A
50 gram- I
mes per
litre.
A-I. 200 c.c. kept closed
in the laboratory.
A-II. 200 c.c. kept open
in the laboratory.
A-III. 200 c.c. kept clos-
ed in the dark room
A-IV. 200 c.c. kept open
in the dark room.
15.14 per
cent.
. . . . . .
13.38 per cent.
......
13.125 per cent.
...... 13.38 per cent.
......
13.125 per cent.
B 100 gram-
mes per
l i t re.
B-I. 200 c.c. kept closed
in the laboratory.
B-II. 200 c.c. kept open
in the laboratory.
B-III. 200 c.c. kept clos-
ecl in the dark room.
B-IV. 200 c.c. kept open.
in the dark room.
15.31 per
cent.
...... 12.95 per cent.
. . . . . .
12.68 per cent.
. . . . . .
12.77 per cent.
. . . . . .
13.3 per cent.
III Two solutions of the
strengths noted in
column 4 were made
on 21st January 1920,
and stored in two
sets of bottles, one set
being left open and
the other set being
closed with stoppers
and allowed to remain
undisturbed for 16
days.
A 100 gram-
mes per
litre.
A-I. 200 c.c. kept open.
A-II. 200 c.c. kept clos-
ed.
33.884 per
cent
of
available
chlorine.
. . . . . .
30.24 per cent.
. . . . . .
30.348 per cent.
B-I. 200 c.c. kept open.
B-II. 200 c.c. kept clos-
ed.
32.465 per
cent
of
available
chlorine.
......
26.85 per cent.
. . . . . .
26.35 per cent.
IV Similar to III
A 100 gram-
mes per-
litre.
A-I.
Similar to A
series of III
A-II.
set.
18.199 per
cent
o f
available
chlorine..
. . . . . .
11.16 per cent.
. . . . . . .
Do.
B 200 gram-
mes per
litre.
B-I.
Similar to B
series of III
B-II.
set.
12.214 per
cent
of
•
available
chlorine.
. . . . . .
9.72 per cent.
......
10.08 per cent.
* These bottles had to be forced open as the stoppers had got stuok and they opened with a loud noise.
3