Exam 14: Oxidation-Reduction Reactions

What are the coefficients of the balanced equation that represents the reaction in a magnesium/chromium electrochemical cell? Mg (s) + Cr³⁺ (aq)  Cr (s) + Mg²⁺ (aq)

Which example represents the oxidation half-reaction for cobalt/cobalt(II)?

What is the oxidation number of carbon in carbon dioxide, CO₂?

Use the partial activity series included to determine which reaction will NOT occur spontaneously. Zn  Zn²⁺ + 2e^- Fe  Fe²⁺ + 2e^- Co  Co²⁺ + 2e^- Ni  Ni²⁺ + 2e^- Cu  Cu²⁺ + 2e^-

Given the following net ionic equation, select the CORRECT pairing of half-reactions. 2 Al (s) + 3 Pb²⁺ (aq)  2 Al³⁺ (aq) + 3 Pb (s)

Which example illustrates a redox reaction?

What is the oxidation number of nitrogen in the nitrate ion, NO₃^-?

The reduction half-reaction for the reaction of zinc with hydrochloric acid is:

What is the oxidation number of sulfur in the thiosulfate ion, S₂O₃^2-?

Which example represents the reduction half-reaction for cobalt/cobalt(II)?

Given the accompanying partial activity series, which element(s) can reduce zinc ion to elemental zinc? Zn Zn²⁺ + 2e^- Fe  Fe²⁺ + 2e^- Co  Co²⁺ + 2e^- Ni  Ni²⁺ + 2e^- Cu  Cu²⁺ + 2e^-

Which statement is TRUE?