Which of the following ions will be expected to have the most negative heat of hydration, ΔH_hydr? A)Na ⁺ B)Cs ⁺ C)Ca ²⁺ D)F ⁻ E)I ⁻

Question

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The heat of hydration is more negative for ions with higher charge and smaller size. Ca²⁺ has a higher charge and smaller ionic radius compared to the other ions listed, leading to a more negative heat of hydration.

Which of the Following Ions Will Be Expected to Have