Why Do Ionic Compounds Have High Melting Points?

I onic compounds can be defined as crystalline solids formed by neatly packed ions of opposite charge. Ionic compounds are usually formed when metals react with non-metals.

Ionic compounds properties

  • Ionic compounds have an equal number of positive and negative ions arranged in the three-dimensional lattice due to which they have high melting points.
  • The strong force of attraction between oppositely charged ions means that ionic compounds have high melting and boiling points.
  • When dissolved in water ionic compounds form a solution in which ions can move. This means that these solutions can conduct electricity.
  • Similarly, if ionic compounds are heated up so that they melt the ions can move and molten ionic compounds can also conduct electricity.

Ionic compounds have high melting points

The positive and negative ions formed during ionic bonding are held together by enormously strong forces of attraction between the oppositely charged ions. These ionic bonds between the charged particles result in a giant structure of ions. Because the ions are held together tightly in this giant structure it takes a lot of energy to break all the bonds. As a result, ionic compounds have high melting and boiling points.

Check out the video given below for more information

Further Reading

  1. Give an example of an ionic compound.
  2. Why are ionic compounds are soluble in water but insoluble in kerosene?

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