Balancing Oxidation-Reduction Equations Answers

Use this oxidation-reduction reaction to answer questions about half-reactions: [image 1] Classify these half-reactions by typing in “O” for “oxidation half-reaction,” “R” for “reduction half- reaction,” and “N” for “neither.” [image 2]

Upper m g right arrow upper M g upper C l subscript 2 plus 2 e superscript minus.

2 upper H upper C l plus 2 e superscript minus right arrow upper H subscript 2.

H2

Zn Right arrow.

Zn2+ +

e–

In the reaction Mg + 2HCl MgCl2 + H2 which element’s oxidation number does not change?

Given the reaction C + O2 CO2 which pair of reactions represents the two half-reactions?

In the reaction which element is reduced in the reaction?

Which of these is an oxidation half-reaction?

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 [image 1] S + NO + H2OReduction half-reaction: N+5 + 3e- [image 2] N+2Oxidation half-reaction: S-2 [image 3] S + 2e-After balancing the chemical equation, what are the coefficients for these compounds?H2S

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

In the reaction Zn + H+ Right arrow. 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:

You are given the reaction Cu + HNO3 Right arrow. Cu(NO3)2 + NO + H2O.Which element is oxidized?

You are given the reaction Cu + HNO3 Cu(NO3)2 + NO + H2O.Which pair of half-reactions represents the balanced half-reactions for the reaction?

Cu +

HNO3