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Na+;K+;Ca2+;Ba2+;Al3+;Pb2+ Fe;2+;Fe3+;Cu2+;Zn2+;Ag+;Hg2+;Mn2+ :3 2-; SO4 2-; Cl-;Br-;I-;e - . ? ? ?:(//) _________ (///) ________(//) ______________ _______________(//) ______________(//)____________ ________ ? ?-__________-____________-__________-_____________ (//) ? . .