Practice question
Question
In 2KBr + 3H₂SO₄ + 2MnO₂ → Br₂ + 2MnSO₄ + 2H₂O + K₂SO₄, which element undergoes the largest increase in oxidation number?
Explanation
Br (-1 in KBr) to 0 in Br₂: +1. Mn (+4 in MnO₂) to +2: -2. Br increases, Mn decreases; Br has the largest increase.
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