First you need to determine with what type of substance you are dealing. Is it an acid or a base? Then you need to know how each disassociates. Acids disassociate to produced H+ ions plus a negatively charged ion. Bases disassociate to produce a positively charged ion plus OH- ions. The chemical formulas for acids usually start with some number of H's followed by the negatively charged ion. (For example, H2SO4 has two H atoms attached to an (SO4)2- ion.) The exception to this is for organic acids. Organic acids will have some sort of standard hydrocarbon group to which is attached one or more COOH groups. It is the H from these groups that disassociates from the molecule. (For example, C4H9COOH disassociates to produce C4H9COO- + H+.) On the other hand, bases usually have chemical formulas that consist of a positively charged ion attached to some number of OH groups. Most of the time, the positively charged ion is simply a single metal ion. The only exception that I know of to this is ammonium hydroxide (NH4OH). Using ammonium hydroxide as an example, when it disassociates, it becomes NH4+ + OH-. Finally, don't confuse an organic acid with a base. Both types of formulas end with OH. However, an organic acid's formula ends with COOH whereas the base's formula lacks the C and O at the end. So, now all you have to do is take the above and apply it to the compounds in your question. If you will post your answer as a comment on this answer, then I will tell you if you are correct.