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Balancing Redox Reaction quiz

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Terms in this set (15)

  • What is the first step in balancing a redox reaction in acidic solution?
    The first step is to split the full redox equation into two half reactions, separating elements different from oxygen or hydrogen.
  • How do you balance elements other than oxygen and hydrogen in half reactions?
    Balance these elements first by ensuring the same number of atoms on both sides of each half reaction.
  • What is the method for balancing oxygen atoms in a redox reaction?
    Add water (H2O) molecules to the side that needs more oxygen atoms until both sides are balanced.
  • How do you balance hydrogen atoms in acidic solutions?
    Add H+ ions to the side that needs more hydrogen atoms until both sides are balanced.
  • What is the purpose of adding electrons in balancing redox reactions?
    Electrons are added to the more positive side to balance the overall charge in each half reaction.
  • What must be true about the number of electrons in both half reactions before combining them?
    The number of electrons in both half reactions must match; if not, multiply the reactions by appropriate factors to equalize them.
  • What are intermediates in redox reactions, and how are they handled?
    Intermediates are species that appear as both reactants and products; they are cancelled out when combining the half reactions.
  • What is the additional step required when balancing redox reactions in basic solutions?
    After following acidic solution steps, add OH- ions to both sides to neutralize any remaining H+ ions.
  • What happens when H+ and OH- are present together in a basic solution?
    H+ and OH- combine to form water (H2O), which may then be cancelled out if present on both sides.
  • How do you determine which side to add electrons to when balancing charge?
    Add electrons to the side with the more positive overall charge to equalize the charges on both sides.
  • What indicates oxidation in a half reaction?
    If electrons are products in the half reaction, it represents oxidation.
  • What indicates reduction in a half reaction?
    If electrons are reactants in the half reaction, it represents reduction.
  • How do you handle coefficients when balancing charges in redox reactions?
    Multiply the charge of each species by its coefficient to determine the total charge for that side.
  • What is the significance of matching electrons in both half reactions?
    Matching electrons ensures the redox reaction is properly balanced and can be combined into a single equation.
  • What is the final step after balancing a redox reaction in basic solution?
    Add OH- ions to both sides equal to the remaining H+ ions, combine H+ and OH- to form water, and cancel out any waters present on both sides.