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3 cards from this section. Quick, good the night before a test.
What is oxidation?
Think about what happens to the charge during oxidation.
What is the oxidation state of oxygen in most compounds?
Consider the common compounds you know.
What happens during oxidation?
Think about what is happening to the electrons in the process.
True or False: The oxidation state of an element in its pure form is 0.
Consider whether the element is bonded with anything else.
Given the half-reaction Cr₂O₇²⁻ + 14H⁺ + 6e⁻ → 2Cr³⁺ + 7H₂O, determine oxidation states of chromium and oxygen.
Remember to consider the overall charge balance in the ion.
Combine the two half-reactions: C₂O₄²⁻ → 2CO₂ + 2e⁻ and MnO₄⁻ + 8H⁺ + 5e⁻ → Mn²⁺ + 4H₂O. What is the overall balanced reaction?
Make sure to equalize the number of electrons transferred in each half-reaction.
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