System

∆E_o, V

Activation energy, Kcal/mole

Reaction velocity constant, cm/sec

Ag⁺/Cu

0.46

2.0 - 5.0

2.5 - 6.0 × 10⁻²

Ag⁺/Cu (CN⁻)

1.83

3.7 - 5.8

1.5 × 10⁻²

Ag⁺/Fe (Cl⁻)

1.29

3.0

2.2 × 10⁻²

Ag⁺/Zn (CN⁻)

0.95

5.5

5.5 × 10⁻²

Ag⁺/Zn

1.56

2.0 - 6.0

2.6 - 2.1 × 10⁻²

Cu²⁺/Zn

1.10

3.1

1.6 - 2.1 × 10⁻²

Pb²⁺/Fe

0.31

12.0

-

Pb²⁺/Zn

0.64

-

0.64 × 10⁻²

Pb²⁺/Cu

0.49

9.5 - 7.4

0.36 - 2.3 × 10⁻²