2. Nhận biết các dung dịch: b) Cách tiến hành: STT 3; Tên thí nghiệm:Nhận biết các dd không nhãn: H2SO4, HCl,Na2SO4; Cách tiến hành; Nêu hiện tượng; Nhận xét -PTHH .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

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