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OpenStudy (anonymous):
What is the oxidation number of P in PF6^-
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OpenStudy (anonymous):
F can only have oxidation number of -1 The overall compound has an oxidation number of -1 You have 6 Fs, so 6(-1) = -6 charge from F X = oxidation number of P x + (-6) = -1 solve for x = +5
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