PUC Karnataka Science Class 12Department of Pre-University Education, Karnataka
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Solution - Explain Why Cu+ Ion is Not Stable in Aqueous Solutions? - PUC Karnataka Science Class 12 - Chemistry

ConceptGeneral Properties of the Transition Elements (D-block)

Questions

Explain why Cu+ ion is not stable in aqueous solutions?

Out of Cu+ and Cu2+, which ion is unstable in aqueous solution and why?

Solution 1

In an aqueous medium, Cu2+ is more stable than Cu+. This is because although energy is required to remove one electron from Cu+ to Cu2+, high hydration energy of Cu2+ compensates for it. Therefore, Cu+ion in an aqueous solution is unstable. It disproportionates to give Cu2+ and Cu.

2Cu_(""(aq))^+ -> Cu_(" "(aq))^(2+) +  Cu_(s)

Solution 2

Cu+ is unstable in aqueous solution while Cu2+ is more stable. Stability in aqueous medium depends upon the hydration energy. Although it will require energy to remove one electron from Cu+ to convert it into Cu2+ but that is compensated by high hydration energy of Cu2+ . Hence, Cu2+ is more stable than that of Cu+

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Reference Material

Solution for question: Explain Why Cu+ Ion is Not Stable in Aqueous Solutions? concept: General Properties of the Transition Elements (D-block). For the courses PUC Karnataka Science, CBSE (Science)
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