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Percentage concentration.
Temperature
coefficients
I
Percentage Temperature i concentra- coefficient i tion. 10~ 6 .
Percentage
concentra-
tion.
Tempera-
ture coeffi-
cients
io- r v
2-19
95
41 -45 293
75-23
447
3-85
94
44 -69 326
78 -07
447
6-76
108
46 -90 340
81-12
484
9-29
122
49-12 352
84-11
441
11-88
128
51 -00 372
85-86
442
16-11
156
54 -63 386
87-26
455
18-27
177 57 -00
388
89-88
441
21-66
190 60-33
40(3
91-24
465
25-07
217 63 -07
420
92-82
488
29 -40
231 66 -GO
419
95-66
483
32 -50
267 67 -92
432
98-67
484
34-26
280 70 -04
418
99-87
490
36-68
279 71 -51
432
39-11
292
74-03
433
It will be observed that these temperature coefficients increase
gradually but by no means uniformly with increase of percentage ;
in both cases only very small differences are measured, which accounts
for the slight irregularities. There is probably some function con-
necting these two factors, but from certain trials made it does not
appear to be of a simple character.
The value for the 60-33 per cent, acid, namely, 0-000406 is not widely different from that 0-000424 given by van der Willigen for his sample of 58*89 per cent, concentration.
mil. Results.
The results for /X D reduced to a uniform temperature are set forth in the following table :
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II
1
Percentage
Percentage
Percentage
concen-
14'2
^n
conceit -
jUj, 14 '-. concen-
V 4 ' 2 -
tration.
t ration.
tration.
2-19
1 -336208
41 -45
1 -38S788 75 -23
1 -405599
3-85
338434
44 -69
392305 78 -07
405091
6-76
342298
46-90
394496 81 '12
404504
9-29
345824
49-12
396699 84-11
403427
11-88
349371
51-0
398435 85 '80
402924
16-11
355107
54-63
401017 87 -20
402412
18-27
358541
57-0
402440 89 '88
401419
21-66
363091
60-33
404080 91 -29
401017
25-07
365152
63-07
405157 92 -82
400249
29-40
374225
66-60
4058(30 95 '66
398148
32-60
377798
67-92
405985 98 '67
396980
34-26
380354
70-04
406094 99 -87
397167 (
36-68
383039
71-57
406046
39-11
386262
74-63
405696
