Determine the dipole moment

[Stacker]

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The bond length of KCL is 314.0 pm. What would be the dipole moment, in D, of this compound by assuming a completely ionic bond?

 

[sleepy425]

The bond length of KCL is 314.0 pm. What would be the dipole moment, in D, of this compound by assuming a completely ionic bond?

when is your homework due?

 

[Insulinshock]

We never had to calculate this; would it just be the electronegativity differences? 2.34 if that's the case.

 

[Isoprop]

There should be an equation in your chem book on how to calculate the magnitude of dipole moments using electronegativities and bond length. It's a straightforward problem.

But this isn't something you need to know for the MCAT.

Edit: whoops, it's an ionic bond. So you would assume a full +1e or -1e for each ion instead of electroneg.

 

[boaz]

...

Edit: whoops, it's an ionic bond. So you would assume a full +1e or -1e for each ion instead of electroneg.

The question probably refers to some wacky gaseous form of KCl. Otherwise, "dipole moment" would be a misnomer. I don't think the term applies to full-fledged ionic species.

 

[Isoprop]

I just looked it up and yes they usually talk about dipole moments of ionic compounds in a gas phase (but nothing "wacky" that I can see).

 

[godcyning]

um yeah...not gonna be on the mcat for sure. In any case, wikipedia to the rescue...just look up electric dipole moment. The equation you seek awaits like, 4 lines down.