Chemistry & Chemical Reactivity

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



Chemistry & Chemical Reactivity

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

Which should have the more negative hydration energy, F or Cl? Explain briefly.

Interpretation Introduction


Whether the flurine F- or chlorine Cl- has more negative hydration energy is to be identified.

Concept Introduction:

  • Electronegativity: It is measure of the ability of an atom in a chemical compound to attract electrons from another atom.
  • Electronegativity trends to increase across a period, as the radius decrease, electron get closer to the bonding atoms nucleus.
  • Electronegativity tends to increase up a group or remain the same, as radius increase, electrons are farther from the bonding atoms nucleus.

Electronegativity character of flurine and chlorine: Flurine is more electronegativity than chlorine it has a lower electron affinity than chlorine.

This is due to the small size of flurine atom, due to the small size, the seven valance electrons experience greater  repulsive force among them, and chlorine atom has extra electron shell will be able to reduce this repulsive force among the electrons.    

In this statement flurine anion F is the smaller ion

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