SAT Chemistry Help

<p>Can anyone explain to me what exactly is a LEWIS ACID and a LEWIS BASE and how it differs from the Bronsted Lowry's?</p>

<p>Sorry for the inconvenience but this occasionally pops up on the practice test and I think if this is answered, many others as well as myself will benefit greatly!</p>

<p>Thank you</p>

<p>From Lewis</a> and Brønsted Acids and Bases:</p>

In the Lowry-Brønsted model: "A Brønsted acid is a proton donor, and a Brønsted base is a proton acceptor (abstractor)". </p>

<p>In the Lewis model: "A Lewis acid is an electron-pair acceptor, and Lewis base is an electron-pair donor ".