4. According to the given ion-molecular equation of the current-generating reaction:
Zn2 H2 2OH- \u003d Zn 2H2O,
write the equations for the anodic and cathodic processes. Calculate the value of the standard equilibrium constant of this current-generating reaction if the values of the standard electrode potentials φ0 are -0.76 and -0.83 V.

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