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# Help needed in chemistry

Why $$Cu^{2+}$$ is most stable,though $$Cu^{+}$$ has a fullfilled $$d$$-orbital.

Note by Souryajit Roy
2 years, 1 month ago

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In this case hydration enthalpy comes into picture,since we are taking about aqueous solutions $$Cu^{2+}$$ has higher hydration enthalpy than $$Cu^{+}$$ because of its small size and higher charge. · 2 years, 1 month ago

what is hydration enthalpy?can you pls explain... · 2 years, 1 month ago

You may refer to this link for further information. · 2 years, 1 month ago

See@Souryajit Roy This is an example of disproportion reaction .As mentioned by@Krishna Sharma HYDRATION ENTHALPY comes into effect. · 2 years ago

In aqueous solution, $${ Cu }^{ + }$$ disintegrates into $${ Cu }^{ 2+ }$$ and Cu. Well , I hope you may have asked the question after coming across this phenomenon, isn't it @Souryajit Roy ? · 2 years, 1 month ago