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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: MiturBinlsderty on October 06, 2010, 06:37:51 PM

Title: Are these bonds polar?
Post by: MiturBinlsderty on October 06, 2010, 06:37:51 PM

Are double bonds to oxygen ( C = O ) and (O-H ) bonds polar? if so what makes them polar?

Title: Re: Are these bonds polar?
Post by: Jorriss on October 06, 2010, 06:46:06 PM

Do you know what polar means?

Title: Re: Are these bonds polar?
Post by: ooosh on October 06, 2010, 09:03:36 PM

In a broad sense,the bond covalent bonding two different atoms is polar.

Title: Re: Are these bonds polar?
Post by: igloo5080 on October 07, 2010, 08:18:27 AM

You need to research the concept of 'electronegativity', because this is what it's all about.

Title: Re: Are these bonds polar?
Post by: AllUnits on October 16, 2010, 09:21:37 PM

The O-H bond is definitely polar. This is because of the large difference in electronegativity values between the two atoms.

Title: Re: Are these bonds polar?
Post by: _rob on November 06, 2010, 06:03:53 PM

Both of these bonds are polar, oxygen is far more electronegative than either Carbon or Hydrogen.

Electronegativity describes the tendancy of an atom to withdraw electron density toward itself in a covalent bond, in this case, leaving the carbon atom or the hydrogen atom electron deffieient and so will result in a partial positive charge (delta+) on these atom, while the Oxygen atom will aquie a partial negative (delta-) charge.

This is how bonds become polar, due to electronegativity difference in the atoms sharing the bond.

Rob

Title: Re: Are these bonds polar?
Post by: rackye on November 06, 2010, 07:09:22 PM

that's right Rob  :) in addition if you want you can calculate the value of the dipolar moment which is given in debye units