Indicate whether the following balanced equations involveoxidation–reduction. If they do, identify the elements thatundergo changes in oxidation number.(a) PBr3(l) + 3 H2O(l)---->H3PO3(aq) + 3 HBr(aq) (b) NaI(aq) + 3 HOCl(aq) ---->NaIO3(aq) + 3 HCl(aq) (c) 3 SO2(g) + 2 HNO3(aq) + 2 H2O(l)--->3 H2SO4(aq) + 2 NO(g)

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Chapter19: Applications Of Standard Electrode Potentials
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Indicate whether the following balanced equations involve
oxidation–reduction. If they do, identify the elements that
undergo changes in oxidation number.
(a) PBr3(l) + 3 H2O(l)---->H3PO3(aq) + 3 HBr(aq)
(b) NaI(aq) + 3 HOCl(aq) ---->NaIO3(aq) + 3 HCl(aq)
(c) 3 SO2(g) + 2 HNO3(aq) + 2 H2O(l)--->
3 H2SO4(aq) + 2 NO(g)

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