Question

what is the definition of a lewis acid?
○ a substance that accepts electrons to form a covalent bond
○ a substance that donates electrons to form a covalent bond
○ a substance that accepts a proton
○ a substance that donates a proton

Explanation:

• According to the Lewis acid - base theory, a Lewis acid is defined as a substance that can accept a pair of electrons to form a covalent bond.
• A substance that donates electrons to form a covalent bond is a Lewis base.
• A substance that accepts a proton is a Brønsted - Lowry base, and a substance that donates a proton is a Brønsted - Lowry acid. So the correct definition of a Lewis acid is a substance that accepts electrons to form a covalent bond.

Answer:

A. a substance that accepts electrons to form a covalent bond