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The difference between Bronsted and Lewis acids and bases is that Lewis acids accept electrons while bronsted acids accept protons. Lewis bases give electrons while bronsted bases give electrons away. They are the same thing but with protons instead of electrons.
Bronsted and Lewis acids essentially mean the same thing but there is a difference in what part of the atom you look at to determine if it's an acid or base. Bronsted acids are proton donors whereas Lewis acids are electron acceptors.
A Bronsted atom is a proton donor, whereas a Lewis acid is an electron acceptor. While the definition of these acids are different, they are complimentary, meaning that if a molecule is a Lewis acid it is also a Bronsted acid. Therefore, both definitions are acceptable.
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