EQUIVALENT CONDUCTIVITY OF ELECTROLYTES IN AQUEOUS SOLUTION
Petr ^
This table gives the equivalent (molar) conductivity A at 25 °C for some common electrolytes in aqueous solution at concentrations up to 0.1 mol/L. The units of A are 10"4 m2 S mol"1.
For very dilute solutions, the equivalent conductivity for any electrolyte of concentration c can be approximately calculated using the Debye-Huckel-Onsager equation, which can be written for a symmetrical (equal charge on cation and anion) electrolyte as
A = A° - (A + 5A°)c1/2
For a solution at 25 °C and both cation and anion with charge |1|, the constants are A = 60.20 and B = 0.229. A° can be found from the next table, "Ionic Conductivity and Diffusion at Infinite Dilution." The equation is reliable for c < 0.001 mol/L; with higher concentration the error increases.
_Concentration (mol/L)_
Compound      Infinite dilution        0.0005 0.001 0.005 0.01 0.02 0.05 0.1
	A"				A(10-4 m'Smol-1)			
AgN03	133.29	131.29	130.45	127.14	124.70	121.35	115.18	109.09
l/2BaCl2	139.91	135.89	134.27	127.96	123.88	119.03	111.42	105.14
l/2CaCl2	135.77	131.86	130.30	124.19	120.30	115.59	108.42	102.41
l/2Ca(OH)2	258	-	-	233	226	214	-	-
CuS04	133.6	121.6	115.20	94.02	83.08	72.16	59.02	50.55
HCl	425.95	422.53	421.15	415.59	411.80	407.04	398.89	391.13
KBr	151.9	149.8	148.9	146.02	143.36	140.41	135.61	131.32
KCl	149.79	147.74	146.88	143.48	141.20	138.27	133.30	128.90
KC104	139.97	138.69	137.80	134.09	131.39	127.86	121.56	115.14
l/3K3Fe(CN)6	174.5	166.4	163.1	150.7	-	-	-	-
l/4K4Fe(CN)6	184	—	167.16	146.02	134.76	122.76	107.65	97.82
KHC03	117.94	116.04	115.28	112.18	110.03	107.17	—	—
KI	150.31	148.2	143.32	144.30	142.11	139.38	134.90	131.05
KI04	127.86	125.74	124.88	121.18	118.45	114.08	106.67	98.2
KNO,	144.89	142.70	141.77	138.41	132.75	132.34	126.25	120.34
KMn04	134.8	132.7	131.9	—	126.5	—	—	113
KOH	271.5	—	234	230	228	—	219	213
KRe04	128.20	126.03	125.12	121.31	118.49	114.49	106.40	97.40
l/3LaCl3	145.9	139.6	137.0	127.5	121.8	115.3	106.2	99.1
LiCl	114.97	113.09	112.34	109.35	107.27	104.60	100.06	95.81
LiC104	105.93	104.13	103.39	100.52	98.56	96.13	92.15	88.52
l/2MgCl2	129.34	125.55	124.15	118.25	114.49	109.99	103.03	97.05
NH4C1	149.6	147.5	146.7	143.9	141.21	138.25	133.22	128.69
NaCl	126.39	124.44	123.68	120.59	118.45	115.70	111.01	106.69
NaC104	117.42	115.58	114.82	111.70	109.54	106.91	102.35	98.38
Nal	126.88	125.30	124.19	121.19	119.18	116.64	112.73	108.73
NaOOCCH3	91.0	89.2	88.5	85.68	83.72	81.20	76.88	72.76
NaOH	247.7	245.5	244.6	240.7	237.9	—	—	—
Na picrate	80.45	78.7	78.6	75.7	73.7	—	66.3	61.8
l/2Na2S04	129.8	125.68	124.09	117.09	112.38	106.73	97.70	89.94
l/2SrCl2	135.73	131.84	130.27	124.18	120.23	115.48	108.20	102.14
ZnS04	132.7	121.3	114.47	95.44	84.87	74.20	61.17	52.61
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