user-avatar
Cutit1211
2 năm trước
1. Nêu hiện tượng và viết phương trình hóa học( nếu có) xảy ra trong các thí nghiệm sau: a) Rót từ từ dd HCl cho đến dư vào dd NaOH có lẫn dung dịch phenolphtalein b) Sục ít khí CO2 vào dd Ca(OH)2 dư c) Nhúng đinh sắt vào dd muối CuSO4 d) Nhỏ dd AgNO3 vào dd KOH e) Cho một mẫu nhỏ CaCO3 vào dd HCl 2.hãy nhận biết các dung dịch riêng biệt ko màu sau bằng phương pháp hóa học: H2SO4 (loãng), K2SO4, KCl, KOH Mình cảm ơn ạ!
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

1. He has been very interested in doing research on _______ since he was at high school. a. biology b. biological c. biologist d. biologically 2. Are you sure that boys are more _______ than girls? a. act b. active c. action d. activity 3. You are old enough to take _______ for what you have done. a. responsible b. responsibility c. responsibly d. irresponsible 4. These quick and easy _______ can be effective in the short term, but they have a cost. a. solve b. solvable c. solutions d. solvability 5. He was looking at his parents _______, waiting for recommendations. a. obey b. obedience c. obedient d. obediently 6. The interviews with parents showed that the vast majority were _______ of teachers. a. support b. supportive c. supporter d. supporting 7. London is home to people of many _______ cultures. a. diverse b. diversity c. diversify d. diversification 8. John cannot make a _______ to get married to Mary or stay single until he can afford a house and a car. a. decide b. decision c. decisive d. decisively 9. My mother used to be a woman of great _______, but now she gets old and looks pale. a. beauty b. beautiful c. beautifully d. beautify 10. Although they are twins, they have almost the same appearance but they are seldom in _______. a. agree b. agreeable c. agreement d. agreeably 11. The more _______ and positive you look, the better you will feel. a. confide b. confident c. confidently d. confidence 12. My parents will have celebrated 30 years of _______ by next week. a. marry b. married c. marriageable d. marriage 13. Many Vietnamese people ______ their lives for the revolutionary cause of the nation a. sacrifice b. sacrificed c. sacrificial d. sacrificially 14. Most of us would maintain that physical ______ does not play a major part in how we react to the people we meet. a. attract b. attractive c. attractiveness d. attractively 15. They had a ______ candlelit dinner last night and she accepted his proposal of marriage. a. romance b. romantic c. romantically d. romanticize 16. They started, as _______ gatherings but they have become increasingly formalized in the last few years. a. informal b. informally c. informalize d. informality 17. Children who are isolated and lonely seem to have poor language and ________. a. communicate b. communication c. communicative d. communicator 18. The lecturer explained the problem very clearly and is always _______ in response to questions. a. attention b. attentive c. attentively d. attentiveness 19. There was a _______ tremble in her voice, which showed that she was very nervous at that time. a. slight b. slighted c. slightly d. slightness 20. If a boss wants to have a well-qualified staff, he should have to pay his employees _______. a. appropriate b. appropriately c. appropriation d. appropriating 21. Mrs. Pike was so angry that she made a _______ gesture at the driver. a. rude b. rudeness c. rudely d. rudest 22. He is not really friendly and makes no attempt to be _______. a. society b. social c. socialize d. sociable 23. She sent me a _______ letter thanking me for my invitation. a. polite b. politely c. politeness d. impoliteness 24. Mr. Timpson's behavior and comments on occasions were inappropriate and fell below the _______ standards. a. accept b. acceptable c. acceptance d. accepting 25. As an _______, Mr. Pike is very worried about the increasing of juvenile delinquency. a. educate b. education c. educator d. educative 26. In England, primary education is provided by state schools run by the government and by _______ fee-paying schools. a. independent b. independently c. depended d. independence 27. The United Nations Secretary-General has often spoken of the need for individual _______ and human rights in his speeches. a. free b. freedom c. freely d. freeing 28. He did not do well at school and left with few _______ qualifications. a. academic b. academy c. academician d. academically 29. The Minister of the Education and Training Department appeared on TV last night to _______ his new policy. a. public b. publicly c. publicize d. publicizing

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team