Physical Chemistry Third Edition

A Tables of Numerical Data 1231

Table A.20 Molar Conductivities and Ion Mobilities at Infinite Dilution in

Water at 298.15 K

Ion λ 0 × 103 /m^2 ohm−^1 mol−^1 u× 108 /m^2 s−^1 V−^1

H+ 34. 982 36. 25

K+ 7. 352 7. 619

Na+ 5. 011 5. 193

Li+ 3. 869 4. 010

NH 4 + 7. 34 7. 61

Ca^2 + 11. 90 6. 166

OH− 19. 820. 5

Cl− 7. 634 7. 912

Br− 7. 84 8. 13

I− 7. 685 7. 96

NO+ 3 7. 144 7. 404

Acetate, C 2 H 3 O− 2 4. 09 4. 24

ClO− 4 6. 80 7. 05

SO 42 − 15. 94 8. 27

From A. J. Bard and L. R. Faulkner,Electrochemical Methods, Wiley, New York, 1980, p. 67.

Table A.21 Electronegativities on the Pauling Scale

Element Value Element Value

H 2.1 K 0.8

He − Ca 1.0

Li 1.0 Sc 1.3

Be 1.5 Ti 1.5

B 2.0 V 1.6

C 2.5 Cr 1.6

N 3.0 Mn 1.5

O 3.5 Fe 1.8

F 4.0 Co 1.8

Ne − Ni 1.8

Na 0.9 Cu 1.9

Mg 1.2 Zn 1.6

Al 1.5 Ga 1.6

Si 1.8 Ge 1.8

P 2.1 As 2.0

S 2.5 Se 2.4

Cl 3.0 Br 2.8

Ar − Kr −