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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

List the following ions in order of hydration energies: Na+, K+, Mg2+, Ca2+. Explain how you determined this order.

Interpretation Introduction

Interpretation:

The given ions in the order of hydration energy have to be arranged.

Concept Introduction:

Hydration energy:

When one mole of ions undergoes hydration, there is a release of certain amount of energy and this energy is termed as hydration energy or hydration enthalpy.

The main factors which affect hydration energy are charge of the ion and ionic radius.

Hydration energy will be higher when the charge on the ion is higher. Also when the size of the ion is smaller, hydration energy will be greater.

Explanation

When one mole of ions undergoes hydration, there is a release of certain amount of energy and this energy is termed as hydration energy or hydration enthalpy.

The main factors which affect hydration energy are charge of the ion and ionic radius.

Hydration energy will be higher when the charge on the ion is higher. Also when the size of the ion is smaller, hydration energy will be greater

CationsCharge of the ionIonic radius(nm)Hydration energy
K++10.138-322kJ/mol
Na++10

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