11. Appendices

11.2. Values of molar conductivity and diffusion coefficient at infinite dilution in water at 25 °C



For the molar conductivity \lambda_i and the equivalent conductivity \lambda_{\text{eq}, i} , the following equation holds: \lambda_i=|z_i| \cdot\lambda_{\text{eq},i} , where z_i is the charge of the ion. The tabulated values are molar conductivities at infinite dilution ( \lambda_i^0 ).

 

 

 

 

 

 

 

 

 

 

 

 

 

ion

zi

λi0
Scm2/mol-1

Di   \times 105

cm2/s-1

ion

zi

λi0
Scm2/mol-1

Di   \times 105

cm2/s-1

 

 

H+

1

349.8

9.312

OH–

-1

197.6

5.260

 

 

Li+

1

38.69

1.030

Cl–

-1

76.34

2.032

 

 

Na+

1

50.11

1.334

Br–

-1

78.3

2.084

 

 

K+

1

73.52

1.957

I–

-1

76.8

2.044

 

 

NH4+

1

73.4

1.954

NO3–

-1

71.44

1.902

 

 

Ag+

1

61.92

1.648

HCO3–

-1

41.5

1.105

 

 

Tl+

1

74.7

1.989

HCO2–

-1

54.6

1.454

 

 

Mg2+

2

106.12

0.7063

CH3CO2–

-1

40.9

1.089

 

 

Ca2+

2

119.00

0.7920

SO42  –

-2

160

1.065

 

 

Sr2+

2

118.92

0.7914

Fe(CN)63  –

-3

303

0.896

 

 

Ba2+

2

127.28

0.8471

Fe(CN)64  –

-4

444

0.739

 

 

Cu2+

2

108

0.72

IO4–

-1

54.38

1.448

 

 

Zn2+

2

106

0.71

ClO4–

-1

67.32

1.792

 

 

La3+

3

208.5

0.617

BrO3–

-1

55.78

1.485

 

 

Co(NH3)63  +

3

306.9

0.908

HSO4–

-1

50

1.33