Science

10th

grade

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Redox Reactions

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  • 1. Multiple Choice
    30 seconds
    1 pt

    Given the equation:

    2 Al + 3 Cu2+ → 2 Al3+ + 3 Cu

    The reduction half-reaction is

    Al → Al3+ + 3e

    Al + 3e → Al3+

    Cu2+ + 2e → Cu

    Cu2+ → Cu + 2e

  • 2. Multiple Choice
    30 seconds
    1 pt

    Given the reaction for the corrosion of aluminum:

    4 Al + 3 O2 → 2 Al2O3

    Which half-reaction correctly represents the oxidation that occurs?

    Al + 3e– → Al3+

    Al → Al3+ + 3e

    O2 + 4e → 2 O2–

    O2 → 2 O2– + 4e-

  • 3. Multiple Choice
    30 seconds
    1 pt

    Which half-reaction correctly represents reduction?

    Ag → Ag+ + e

    F2 → 2 F+ 2e

    Au3+ + 3e→ Au

    Fe2++ e → Fe3+

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