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7. If an ionic bond is stronger than a dipole-dipole interaction, how can water dissolve an...

7. If an ionic bond is stronger than a dipole-dipole interaction, how can water dissolve an ionic compound?

  

None of these

   

The ion-dipole interactions of a bunch of water molecules gang up on the strong ionic bond and pull it into the solution.

   

The ions never overcome their interatomic attraction and therefore are not soluble.

   

The ionic bond is weakened by the ion-dipole interactions and ionic repulsion ejects the ions from the crystal.

   

The ion-dipole interaction causes the ions to heat up and vibrate free of the crystal.

8.The separation of charges within a polar molecule is called a(n) ________.

  

polar bond

   

strong attraction

   

dipole

   

ionic bond

   

dipole-dipole

9. Select the two compounds that are more likely to be a gas at room temperature (as opposed to a liquid).

  

CH4

  

CH3OH

  

C2H6

  

H2O

10.The bonds between hydrogen and oxygen in a water molecule can be characterized as

  

intramolecular forces.

  

intermolecular forces.

  

London forces.

  

dispersion forces.

  

hydrogen bonds.

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Homework Answers

Answer #1

7. Option B, ions are surrounded by water molecules by hydration.

8. Option E, dipole-dipole

Example, CO2& SO3 etc.

9. Options A and C.

CH4 & C2H6 are gases and remaining are liquids.

10. Option E, Hydrogen bonds.

Because of Hydrogen bonds water has maximum boiling point.

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