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Parent acids

Posted: Wed Apr 11, 2018 12:22 pm
by NatalieSDis1A
I have not taken chemistry in 3.5 years so I am trying to figure out the correct naming of cations and anions. In section F.D.2 the book has a chart of common anions and their parent acids but doesn't say anything about the parent acids. It appears that the parent acids just have an H added to the anion. I have jumped ahead to the acid section but it is still unclear to me how adding the hydrogen makes the anion an acid. Why is the hydrogen so important?

Re: Parent acids

Posted: Wed Apr 11, 2018 1:43 pm
by Patience Olsen 1A
By the Arrhenius theory, an acid is any compound that releases a hydrogen ion into solution when dissolved. There are other acids (Brønsted–Lowry and Lewis) that go beyond this theory but that's irrelevant to the question.

Basically, the release of a hydrogen ion in solution is one way to define a compound as an acid.
The book probably used parent acids to explain anions because acids (at least Arrhenius acids) will always dissolve completely in solution to produce hydrogen ions and anions.

Hope this helps!