General Science • ChemistryMedium
Which of the following is considered a Lewis acid?
A. NH3
B. H2O
C. BF3✓ Correct Answer
D. OH-
💡 Solution & Explanation
Boron trifluoride functions as a classic Lewis acid because the central boron atom possesses only six valence electrons, leaving an incomplete octet that readily accepts an electron pair from a donor species. Ammonia and water act as Lewis bases because they contain lone pairs of electrons available for donation.
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