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  • E^{o} of Cu is + 0.34V while that of Zn is – 0.76V. Explain.

E^{\Theta } of Cu is + 0.34V while that of Zn is – 0.76V. Explain.

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Cu has to lose an electron from a fully filled 3d^{10} orbital to become Cu^{2+}. This isn’t balance by the hydration enthalpy giving Cu  a positive E^{\Theta } value. On the other hand, Zn forms a relatively more stable Zn^{2+} with an electronic configuration of 3d^{10} , which is completely filled, it has a lower ionization enthalpy than Cu^{2+}, but nearly the same hydration energy and a negative E^{\Theta } value.

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