Lenntech
Tech Manual Excerpt
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FILMTEC Membranes
Addendum: Conductivity of Solutions
Conductivity of
Solutions
Table 9.3 Conductivity of solutions, acids, alkalies and salts 77°F (25°C) expressed
as µS/cm per meq/l
Component
HCl
HNO3
H2SO4
H3PO4
NaOH
KOH
NH4OH
NaCl
Na2SO4
Na2CO3
NaHCO3
KCl
Infin. diluted
426
421
430
419
248
271
271
126
130
124
96.0
150
0.1
425
420
424
394
247
270
109
126
128
122
95.2
149
0.5
423
417
412
359
246
269
49
124
126
120
94.2
148
Concentration in meq/l
1.0
5.0
421
415
416
410
407
390
336
264
245
241
268
264
36
17
124
121
124
117
119
112
93.5
90.5
141
144
10.0
412
407
380
223
238
261
12
118
113
108
88.4
141
50.0
399
394
346
133
227
251
5.6
111
97.7
93.2
80.6
133
100.0
392
386
317
104
221
246
3.9
107
90.0
86.3
76.0
129
The graphs on the following page relate the conductivity of a solution containing one given
chemical to the concentration of this chemical.
The conductivity of solutions at other temperatures can be calculated by multiplying
conductivities at 77°F (25°C) with the correction factors in the following table. These factors
are only valid for diluted solutions as they presuppose total ionic dissociation of the
chemical.
Table 9.4 Conductivity correction factors
HCl
H2SO4
NaCl
NaOH
KOH
Page 1 of 2
32°F (0°C)
0.66
0.66
0.53
0.54
0.55
64°F (18°C)
0.89
0.87
0.86
0.89
0.89
* Trademark of The Dow Chemical Company
77°F (25°C)
1.00
1.00
1.00
1.00
1.00
122°F (50°C)
1.37
1.38
1.57
1.51
1.50
Form No. 609-02127-804
Conductivity of
Solutions (cont.)
Figure 9.1 Conductivity of ionic solutions at 77°F (25°C)
22
HCl
20
H2SO4
NaOH
18
KOH
Conductivity, µS/cm
16
NH3
14
NaCl
12
10
8
6
CO2
4
2
0
0
1
2
3
4
5
6
7
8
9
10
Concentration, g/m (mg/l)
3
Figure 9.2 Conductivity of ionic solutions at 77°F (25°C)
Notice: The use of this product in and of itself does not necessarily guarantee the removal of cysts and pathogens from water.
Effective cyst and pathogen reduction is dependent on the complete system design and on the operation and maintenance of
the system.
Notice: No freedom from any patent owned by Seller or others is to be inferred. Because use conditions and applicable laws
may differ from one location to another and may change with time, Customer is responsible for determining whether products
and the information in this document are appropriate for Customer’s use and for ensuring that Customer’s workplace and
disposal practices are in compliance with applicable laws and other governmental enactments. Seller assumes no obligation or
liability for the information in this document. NO WARRANTIES ARE GIVEN; ALL IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED.
Page 2 of 2
*Trademark of The Dow Chemical Company
Form No. 609-02127-804