ln(v) = A - Ea/RT
1 g = 1000 mg
1 m2 = 10 dm2
1 m2 ........................... 1000 mg
x m2 ........................... 1 mg
= 1000 m2
1 mg/m2 ........................ 1 h
1000 mg/m2 ................ t = 1000 h
A(-): Zn ---> Zn²⁺ + 2e-
K(+): H2O + 1/2O2 + 2e- --> 2HO⁻
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Zn + H2O + 1/2O2 ---> Zn(OH)2