Practice question
Question
In 2K₂Cr₂O₇ + 14HCl → 2CrCl₃ + 2KCl + 3Cl₂ + 7H₂O, how many electrons are transferred?
Explanation
Cr (+6 in Cr₂O₇²−) to +3 in CrCl₃: 4 Cr gain 12 electrons. Cl (-1 to 0): 6 Cl lose 12 electrons. Total = 12.
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