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Определить роль хрома в окислительно-восстановительном процессе:
Cr+H2S+H2SO4->Cr2 (SO4)3+S+H2O
Поставте коэффициенты электронного баланса
Ответы 1
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Начальная степинь окисления хрома в реакции - 0В соединени Cr2(SO4)3 хром приобрел степень окисления +3Из этого следует, что хром отдал 3 электрона, а значит, он является в реакции восстановителем.8Cr + 15H2SO4 -> 4Cr2(SO4)3 + 3H2S + 12H2O
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Автор:
martha - 5 лет назад
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