QuestionJuly 25, 2025

Some ions are sketched below. Rank them in increasing order of size of hydration enthalpy Delta H_(myd) That is, select I next to the ion with the smallest Delta H_(hrd') select 2 next to the ion with the next bigger Delta H_(hyd') and so on. (-) [Choose one) V (Choose one) V square . square Note for advanced students:please compare the absolute magnitude of Delta H_(hyd). For example, if Delta H_(hyd)=-1kJ/mol for the first lon and Delta H_(hyd)=-2kJ/mol for the second ion, then the first ion has the smaller Delta H_(hyd) and the second lion has the bigger Delta H_(myd).

Some ions are sketched below. Rank them in increasing order of size of hydration enthalpy Delta H_(myd) That is, select I next to the ion with the smallest Delta H_(hrd') select 2 next to the ion with the next bigger Delta H_(hyd') and so on. (-) [Choose one) V (Choose one) V square . square Note for advanced students:please compare the absolute magnitude of Delta H_(hyd). For example, if Delta H_(hyd)=-1kJ/mol for the first lon and Delta H_(hyd)=-2kJ/mol for the second ion, then the first ion has the smaller Delta H_(hyd) and the second lion has the bigger Delta H_(myd).
Some ions are sketched below. Rank them in increasing order of size of hydration enthalpy Delta H_(myd) That is, select I next to the ion with the smallest Delta H_(hrd') select 2 next to the ion with the next bigger Delta H_(hyd') and so on. (-) [Choose one) V (Choose one) V square . square Note for advanced students:please compare the absolute magnitude of Delta H_(hyd). For example, if Delta H_(hyd)=-1kJ/mol for the first lon and Delta H_(hyd)=-2kJ/mol for the second ion, then the first ion has the smaller Delta H_(hyd) and the second lion has the bigger Delta H_(myd).

Solution
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Answer

1. Largest ion or lowest charge (smallest |\Delta H_{hyd}|) ### 2. Next largest ion or lower charge ### ... ### n. Smallest ion or highest charge (largest |\Delta H_{hyd}|) Explanation 1. Understand Hydration Enthalpy Hydration enthalpy (\Delta H_{hyd}) is the energy released when ions are surrounded by water molecules. Smaller, highly charged ions have larger (more negative) \Delta H_{hyd}. 2. Analyze Ion Characteristics Consider ion size and charge. Smaller ions with higher charges have greater hydration enthalpies. 3. Rank Ions by Size and Charge Rank ions from smallest to largest based on their size and charge. The smaller and more charged an ion, the larger its absolute \Delta H_{hyd}.

Explanation

1. Understand Hydration Enthalpy<br /> Hydration enthalpy ($\Delta H_{hyd}$) is the energy released when ions are surrounded by water molecules. Smaller, highly charged ions have larger (more negative) $\Delta H_{hyd}$.<br /><br />2. Analyze Ion Characteristics<br /> Consider ion size and charge. Smaller ions with higher charges have greater hydration enthalpies.<br /><br />3. Rank Ions by Size and Charge<br /> Rank ions from smallest to largest based on their size and charge. The smaller and more charged an ion, the larger its absolute $\Delta H_{hyd}$.
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