Question

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Potassium persulfate (Anthion) is used in photography to remove the last traces of hypo from photographic papers and plates. A 0.8162-g sample was found to contain 0.2361 g of potassium and 0.1936 g of sulfur; the rest was oxygen. The formula weight of this compound was measured to be 270. What are the empirical and molecular formulas of potassium persulfate? (Arrange the atomic symbols in the formulas in the order KSO.)

Answer 1

Answer: the empirical formula of potassium persulfate is KSO₄, and its molecular formula is K₂S₂O₇.

Explanation: the empirical formula of potassium persulfate is KSO₄, and its molecular formula is K₂S₂O₇.