Реакции ионного обмена. 1. Mg( NO3)2+H2SO4. 2.KCl+Ba(OH)2. Задачка. Дано: m(KCl)=7,5г. m(Ba(OH)2)=17,1 г. Найти m(BaCl2)-? Практический выход 96,8%
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