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tranlonglove
2 năm trước
Câu 12. Trong phòng thí nghiệm khí clo thường được điều chế bằng cách đun nóng ung dịch HCI đậm đặc với: A. NaCl. C. H2SO4. D. MnO2. В. КСІ. Câu 13. BaCl, không thể dùng để nhận biết? B. NAOH. D. K2SO4. C. H2SO4. ở nhiệt độ thường, dung dịch tạo ra có chứa: A. NazCO3.
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