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lekhacduongcnsh
2 năm trước
Để nhận ra 3 lọ đựng các dung dịch không màu : CH3COOH, C6H12O6 (glucozơ); C2H5OH bị mất nhãn bằng phương pháp hoá học có thể dùng * A. giấy quỳ tím. B. dung dịch Ag2O/NH3. C. giấy quỳ tím và Na. D. giấy quỳ tím và dung dịch Ag2O/NH3.
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