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  3. Pearson (PEARSON)
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  5. Chemistry 2015
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  7. Unit 2 - Bonding and Structure

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Topic 2 - Chemical Bonding and Structure - Revision Notes 2015

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  • Grado
  • Unit 2 - Bonding and Structure
  • Institución
  • Pearson (PEARSON)

A comprehensive in-depth, specification led, revision booklet of the 2015 spec chemistry AS level course. Written during AS studies by an AS student, meaning it is written in an easily comprehensible stance for any student wishing to find extra resources to revise from.

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Información del documento

  • 4 de septiembre de 2016
  • 31
  • 2015/2016
  • Notas de lectura
  • Desconocido
  • Todas las clases

Temas

  • chemistry
  • edexcel
  • 2015 spec
  • chapter 2
  • revision
  • booklet
  • a level
  • chemical bonding and structure
  • as
  • edexcel a level chemistry revision notes

Escuela, estudio y materia

  • A/AS Level
  • Pearson (PEARSON)
  • Chemistry 2015
  • Unit 2 - Bonding and Structure
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A Cook 2015
Chemistry Led Specification Revision

Chapter 2 - Chemical Bonding and Structure

Topic 2A - Bonding

(a) Know that ionic bonding is the strong electrostatic attraction between oppositely charged ions

Ionic Bonding: THE ELECTROSTATIC ATTRACTION BETWEEN OPPOSITE CHARGED IONS

The nature of ionic bonding:
• Ionic bonding is confined to solid materials consisting of a regular array of oppositely charged
ions extending throughout a giant lattice network

• Most familiar ionic compound is sodium chloride, NaCl. It consists of a regular array of Sodium
ions, Na+ and chloride ions, Cl-.




• In an ionic solid, there are strong electrostatic attractions between ions.
• Ions arranged to that opposite electrostatic attractions can exist to be stronger than the repulsion
of ions with the same charge

Factor effecting ionic bonding:
• The electrostatic interaction between ions is not directional: all that matters is the distance
between two ions, not their orientation with respect to one another.

The strength of ionic bonding:
• The strength of an ionic bond can be calculated by working out the energy required in one mole
of solid to separate the ions to infinity (to the gas phase).
• When they are at an infinite distance from one another the ions can no longer interact.

The table shows the energy required to separate to infinity the ions in one mole of various
alkali metal halides:
Increasing Size of Anion
Increasing Size of Cation




Amount of energy required to separate the ions to infinity /kJ mol-1

F- Cl- Br- I-

Li+ 1031 848 803 759

Na+ 918 780 742 705

K+ 817 711 679 651

Rb+ 783 685 656 628

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