Hello, here is my problem. Calculate the mass of solid sodium sulfate that must be added to 250.0 mL of a 0.200 M solution of barium nitrate to precipitate all of the barium ions in the form of barium sulfate. Please ignore the problem, all I want to know is how to write out the compound for this problem. You do not need to solve it, just teach me how to write this compound out. Thank you.

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