I can think of a better choice than shaziaahsan's, but the person with the best answer is Borek, this question is too general for a good answer. You should have some idea of what ions to expect. Is there any more to the question? See what your textbook says.
There are some, but not a whole lot of, hints we can give you to help you along. Beyond that you're called to memorize a small subset of the solubility and reaction rules for anions and cations, or follow a carefully planned flowchart.