Which cation in each set is expected to have the larger (more negative)hydration energy? I.Li⁺ or Na⁺ II.Rb⁺ or Cu²⁺ A)Li⁺ in set I and Rb⁺ in set II B)Li⁺ in set I and Cu²⁺ in set II C)Na⁺ in set I and Rb⁺ in set II D)Na⁺ in set I and Cu²⁺ in set II

Question

Quizplus · Accepted Answer

Hydration energy is inversely related to the size of the ion; smaller ions have larger (more negative) hydration energies. Li+ is smaller than Na+, so it has a larger hydration energy. Cu2+ is smaller and has a higher charge than Rb+, leading to a larger hydration energy due to stronger attraction to water molecules.

Which Cation in Each Set Is Expected to Have the Larger