Oxidation-Reduction Answers

Use this oxidation-reduction reaction to answer questions about half-reactions: Classify these half-reactions by typing in “O” for “oxidation half-reaction,” “R” for “reduction half- reaction,” and “N” for “neither.”

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In the reaction which element is reduced in the reaction?

Consider the iron-oxygen reaction.4Fe + 3O2 2Fe2O3How many electrons would be exchanged in the reaction? electrons

Given the two half-reactions, what must be done in the next step before the reaction can be balanced?

Given the two half-reactions, what must be done in the next step before the reaction can be balanced? How many electrons are produced/used in this redox reaction when it is balanced?

Consider this reaction: H2S + HNO3 S + NO + H2OReduction half-reaction: N+5 + 3e- N+2Oxidation half-reaction: S-2 S + 2e-After balancing the chemical equation, what are the coefficients for these compounds?H2S

HNO3

Consider this reaction: Fe2O3 + S Fe + SO2Reduction half-reaction: 2Fe+3 + 6e- 2FeOxidation half-reaction: S S+4 +4e-After balancing the chemical equation, what are the coefficients for these compounds?Fe

SO2

In the reaction Zn + H+ Zn2+ + H2, Zn is oxidized and H is reduced.How many electrons would be produced and used in the balanced half-reactions? Complete the balanced half-reactions:

H+ +

e–

H2

Zn

Zn2+ +

e–