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Question

Define hydrated radius?


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Solution

Hydrated radius :

  • It is defined as the radius of ion and closely bound water molecules.
  • It is inversely related to the atomic radius of an element.
  • The ions with larger size and low charge hold water molecules less tightly and therefore have a smaller atomic radius.
  • Ions of smaller size and higher charge hold water molecules less tightly and have a smaller hydrated radius than small ions with a higher charge.
  • The ionic radius increases from top to bottom, whereas the hydrated radius decreases.

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