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Lewis Acid/Base vs. Regular Acid/Base

Posted: Sun Nov 05, 2017 12:55 pm
by lizzygaines1D
...is there a difference between a Lewis Acid/base vs. a regular acid/base? If so, what is it. Very confused.

Re: Lewis Acid/Base vs. Regular Acid/Base

Posted: Sun Nov 05, 2017 1:18 pm
by Rachel Formaker 1E
Lewis acids and bases are defined in terms of electrons, while regular (Bronsted) acids and bases are defined in terms of protons.

A Lewis acid accepts an electron pair and a Lewis base donates an electron pair.

A Bronsted acid donates a proton and a Bronsted base accepts a proton.

If something is a Lewis acid, then it will also be a Bronsted acid, and the same is true for bases.

For example, with H2O, H+ is a Lewis acid because it accepts an electron pair, and it is also a Bronsted acid because it donates a proton. OH- is a Lewis base because it donates an electron pair, and it is also a Bronsted base because it accepts a proton.