how do we get to know if a molecule is polar or non polar in nature?what is an electron cloud?

Asked by nand DAVE | 29th Jul, 2014, 07:15: PM

Expert Answer:

Dear nand030599@gmail.com

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however, answer to your first query is,
 
A polar molecule has a net dipole as a result of the opposing charges (i.e. having partial positive and partial negative charges) from polar bonds arranged asymmetrically. 

Water (H2O) is an example of a polar molecule since it has a slight positive charge on one side and a slight negative charge on the other. The dipoles do not cancel out resulting in a net dipole. Due to the polar nature of the water molecule itself, polar molecules are generally able to dissolve in water. 

A molecule may be non-polar either when there is an equal sharing of electrons between the two atoms of a diatomic molecule or because of the symmetrical arrangement of polar bonds in a more complex molecule.

Most non-polar molecules are water-insoluble (hydrophobic) at room temperature. However, many non-polar organic solvents, such as turpentine, are able to dissolve polar substances. 
 
 
Regards

Topperlearning Team.

Answered by Hanisha Vyas | 30th Jul, 2014, 11:56: AM