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K 2 Cr 2 O 7 + 7H 2 SO 4 + 6FeSO 4 → Cr 2 (SO 4 ) 3 + 3Fe 2 (SO 4 ) 3 + K 2 SO 4 + 7H 2 O

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K₂Cr₂O₇ + 7H₂SO₄ + 6FeSO₄ → Cr₂(SO₄)₃ + 3Fe₂(SO₄)₃ + K₂SO₄ + 7H₂O

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