Chapter 7 Reference
7.1 Conductivity measurement
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Conductivity and temperature coefficient for various solutions
The following table shows the conductivity (converted to 25 ºC) and the
temperature coefficient at that time, for various kinds of solution.
Substance
Temp.
(ºC)
Conc.
(wt%)
Cond.
(S/m)
Temp.
coef.
(%/°C)
Substance
Temp.
(ºC)
Conc.
(wt%)
Cond.
(S/m)
Temp.
coef.
(%/°C)
NaOH
15
5
19.69
2.01
NaCl
18
5
6.72
2.17
10
31.24
2.17
10
12.11
2.14
15
34.63
2.49
15
16.42
2.12
20
32.70
2.99
20
19.57
2.16
30
20.22
4.50
25
21.35
2.27
40
11.64
6.48
Na
2
SO
4
18
5
4.09
2.36
KOH
15
25.2
54.03
2.09
10
6.87
2.49
29.4
54.34
2.21
15
8.86
2.56
33.6
52.21
2.36
Na
2
CO
3
18
5
4.56
2.52
42
42.12
2.83
10
7.05
2.71
NH
3
15
0.1
0.0251
2.46
15
8.36
2.94
1.6
0.0867
2.38
KCl
18
5
6.90
2.01
4.01
0.1095
2.50
10
13.59
1.88
8.03
0.1038
2.62
15
20.20
1.79
16.15
0.0632
3.01
20
26.77
1.68
HF
18
1.5
1.98
7.20
21
28.10
1.66
4.8
5.93
6.66
KBr
15
5
4.65
2.06
24.5
28.32
5.83
10
9.28
1.94
HCl
18
5
39.48
1.58
20
19.07
1.77
10
63.02
1.56
KCN
15
3.25
5.07
2.07
20
76.15
1.54
6.5
10.26
1.93
30
66.20
1.54
−
−
−
H
2
S0
4
18
5
20.85
1.21
NH
4
Cl
18
5
9.18
1.98
10
39.15
1.28
10
17.76
1.86
20
65.27
1.45
15
25.86
1.71
40
68.00
1.78
20
33.65
1.61
50
54.05
1.93
25
40.25
1.54
60
37.26
2.13
NH
4
NO
3
15
5
5.90
2.03
80
11.05
3.49
10
11.17
1.94
100.14
1.87
0.30
30
28.41
1.68
−
−
−
50
36.22
1.56
