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Question

Why are ionic compounds are soluble in water but insoluble in kerosene?


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Solution

Ionic compounds:-

  • Ionic compounds are compounds that are held together by oppositely charged ions and are held together by strong electrostatic force.
  • An example of such a compound is Sodium chloride(NaCl).
  • Ionic compounds are generally soluble in highly polar solvents.
  • Water is a polar covalent solvent, and it opposes the electrostatic force between the ionic compounds.
  • This results in the dissociation of the ionic compound into its constituent anion and cation.
  • In this case, when the Sodium chloride dissociates in water and forms Na+andCl-ions: NaClSodiumchlorideNa+Sodiumion+Cl-Chlorideion
  • On the other hand, Kerosene is a nonpolar solvent and only dissolves non-polar compounds only.
  • Since ionic compounds are not non-polar, hence they do not get dissociated in kerosene.
  • In other words we can say that Ionic compounds are soluble in Water, but not in kerosene.

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