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Anonymous asked in Science & MathematicsChemistry · 2 years ago

Which of the following is an oxidation-reduction reaction?

Ba(C2H3O2)2 (aq) + Na2SO4 (aq) -> BaSO4 (s) + 2NaC2H3O2 (aq)

Cu (s) + 2AgNO3 (aq) -> 2Ag (s) + Cu(NO3)2 (aq)

HCl (aq) + NaOH (aq) -> H2O (l) + NaCl (aq)

AgNO3 (aq) + HCl (aq) -> AgCl (s) + HNO3 (aq)

H2CO3 (aq) + Ca(NO3)2 (aq) -> 2HNO3 (aq) + CaCO3 (s)

Is it 2, because Cu's oxidation number is 0 and it gains electrons in the reaction? I'm guessing. If yes, how do I know that the others are not?

1 Answer

  • 2 years ago

    Cu (s) + 2AgNO3 (aq) -> 2Ag (s) + Cu(NO3)2 (aq)

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