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Grade 10Inorganic Chemistry

Higher the electronegativity, higher is the acidity..then why is acidity of BBr3>BCl3>BF3??

Profile image of Salahuddin Shaikh
9 Years agoGrade 10
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1 Answer

Profile image of Umakant biswal
9 Years ago
the same is happening due to the phenomenon called as BACK BONDING , due to back bonding the electron donation by flourine to boron , electron density increases in boron , and hence its lewis acid charecter decreases . 
inorder to acheive octect around boron , which gives stability to the molecule . 
as we move F TO CL the size of the orbitals will increases , and hence there is not much effective back bonding in case of bcl3 . 
HOPE IT CLEARS 
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