<p>Does anyone know any good sites that have practice problems for AP Chem material, and, more specifically, acid-base chemistry? It'd be a big help.</p>
<p>Have you checked out the Barron's or Princeton Review books? Usually an excellent source of practice problems. (don't know if they have an online version, though).</p>
<p>If you do local exam USNCO problems you should have no trouble getting a 5 on the AP Exam (or so they say)</p>