Exam Style Question - 1

AQA AS-level ChemistryOxidation and ReductionLesson 12 of 15

Question: Deduce the oxidation state of chromium in Cr₂O₇^2- and of sulfur in SO₄^2-.

Rules: oxygen is -2 in most compounds, and the sum of the oxidation states in an ion equals the charge on the ion.

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