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4. Учитывая величины стандартных потенциалов пар МnO2/Мn2+ и Сl2/2Сl-, укажите, в каком направлении должна идти реакция между ними? Как объяснить тот факт, что в лабораториях получают Сl2 действием концентрированной НСl на МnО2?
