Images S SO2 SO3 H2SO4 ОСУЩЕСТВИТЕ

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S so2 so3 h2so4 осуществите. Cr2o72- cr3+. Cr2+ cr2o72-. Cr2o 2 – 7 + 14 h + + 6 e – = 2 CR 3+ + 7 h2o. 2cr+3 → cr2o72-.
Cr2o72- cr3+. Cr2+ cr2o72-. Cr2o 2 – 7 + 14 h + + 6 e – = 2 CR 3+ + 7 h2o. 2cr+3 → cr2o72-.

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