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Why does BF3 function as a Lewis acid?

1. BF3 functions as a Lewis acid.
2. BF3 serves as a Lewis acid due to its electron deficiency.
3. The boron atom in diborane is electron deficient.
4. Trimethylborane is electron deficient and acts as a Lewis acid.

Correct answer: BF3 serves as a Lewis acid due to its electron deficiency.

Solution

BF3 acts as a Lewis acid because boron in BF3 has only six electrons in its valence shell, making it electron-deficient and capable of accepting a lone pair of electrons.

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