Question

An acid may be defined as..

A. a substance that accepts protons

B. a substance that donates protons

Answer 1

think about it.

Answer 2

I don't know if I'm correct but, Wikipedia says that "the Brønsted-Lowry definition is an expansion: an acid is a substance which can act as a proton donor."

Also, the same link says that "by the Brønsted-Lowry definition, any compound which can easily be deprotonated can be considered an acid."

Link:
http://en.wikipedia.org/wiki/Acid

In conclusion, I would say B.

Answer 3

Ok Thanks (:

Answer 4

No problem. :)