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Based on the Quiz 2 preparation quiz in the workbook, you don't need to know the polyatomic ions or they're given to you. Though I'd say it's good to know some of the frequently used polyatomic ions like sulfate, just in case.
Naming compounds was covered in the very beginning of the course reader, so I'm expecting that we should know the simple rules that were outlined there. Besides, even if we aren't going to be quizzed on it, I feel that it would be helpful to know it anyways.
Overall I feel it is always good to know/memorize some of the simple polyatomic ions but for the most part it seems that the homework and workbook questions provide the names so I believe it will be provided as stated before.
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