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hoangtudeptrai
2 năm trước
A là dung dịch AlCl3, B là dung dịch KOH 2M. Thêm 300ml dung dịch B vào cốc đựng 200ml dung dịch A khuấy đều thì trong cốc tạo ra 15,6 g kết tủa. Lại thêm tiếp vào cốc 200ml dung dịch B, khuấy đều thì khối lượng kết tủa là 21,84 g. Tính nồng độ mol của dung dịch A.
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