Practice question
Question
In 2HNO₃ + 3H₃AsO₃ → 2NO + 3H₃AsO₄ + H₂O, how many electrons are transferred per mole of HNO₃?
Explanation
N (+5 in HNO₃) to +2 in NO: 2 N gain 6 electrons. As (+3 to +5): 3 As lose 6 electrons. Per HNO₃ = 6/2 = 3.
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