Question about Acid/Bases

[silkworm]

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Why is BF3 (boron trifloride) is an acid while BH3 is a base? In both case boron has a less than a octet. Is it only because Flurine is more electronegative and therefore sucks away the electrons from Boron?

 

[javandane]

Is it only because Flurine is more electronegative and therefore sucks away the electrons from Boron?

yup.

 

[brynn7]

http://forums.studentdoctor.net/showthread.php?t=137845