Question

Which is more stable Cu2+ or Cu+ and why?

Answer 1

comparing to Cu+, Cu2+ has a high density of positive charge .and the heat of hydration is increased as its charge density increases. So Cu2+ releases more heat as it dissolves.Then it achieves more stroger bonds with water molecules than Cu+.so although Cu+ appears to be more stable with electron configuration,actually Cu2+ has more stability in solutions

Answer 2

Hope it's help you


Stability depends on the hydration energy (enthalpy) of the ions when they bond to the water molecules. The Cu2+ ion has a greater charge density than Cu+ ion and thus forms much stronger bonds releasing more energy.

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