Consider the following equation: Cr2O2-7(aq) + 14H+(aq) + 6e- → 2Cr3+(ag) + 7H2O(1). The oxidation…

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Chemistry WAEC 2002

Consider the following equation: Cr2O2-7(aq) + 14H+(aq) + 6e– → 2Cr3+(ag) + 7H2O(1). The oxidation number of chromium changes from

  • -2 to + 3
  • -2 to + 6
  • +6 to +3 checkmark
  • +7 to + 6

The correct answer is: C

Explanation

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