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Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640

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Chapter
Section
BuyFindarrow_forward

Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640
Chapter 11, Problem 34GQ
Textbook Problem
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Which of the following ionic compounds will have the most negative enthalpy of hydration?

  1. (a) Fe(NO3)2
  2. (b) CoCl2
  3. (c) NaCl
  4. (d) Al(NO3)3

Interpretation Introduction

Interpretation: Ionic compounds having the most negative enthalpy of hydration has to be identified from the given options.

Concept Introduction:

Enthalpy of hydration is the enthalpy of solvation of ions.

The value of enthalpy of hydration depends on

  • Charge of the ion
  • Distance between the center of ion and the oppositely charged end of the water dipole.

Explanation of Solution

Reason for correct option

The charge of Al is +3 and Na is +1 whereas the charge of Fe and Co +2

The size of Al3+ is the smallest. Hence Al3+ ion can strongly interact with the water molecule

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Chapter 11 Solutions

Chemistry & Chemical Reactivity
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