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Cr na. CR Oh 3 h2o2 h2so4. CR+3oh = CR (Oh)3. CR(3) до cro4. CR(Oh)3+3h2so4 = cr2(so4)3+6h2o.
CR Oh 3 h2o2 h2so4. CR+3oh = CR (Oh)3. CR(3) до cro4. CR(Oh)3+3h2so4 = cr2(so4)3+6h2o.