Viết pt hóa học của các phản ứng tạo ra bazơ và axit. Làm thế nào để nhận biết được dung dịch axit và dung dịch bazơ. (Ai giúp em với ạ, em cảm ơn trước ạ)

Các câu hỏi liên quan

He ____ for London one year ago. A. left B. has left C. leaves D. had left She ____ in Hue for twenty years. A. lives B. has lived C. lived D. will live I ____ to the market with my mother yesterday. A. go B. went C. have gone D. was going What ____ you ____, Nam? – I’m thinking of my mother. A. do/think B. are/thinking C. have/thought D. were/thinking How long ____ you ____ her? – For five months. A. do/know B. are/knowing C. have/known D. had/known I usually ____ to school by bus. A. went B. am going C. go D. have gone Yesterday morning I ____ up at 6.30. A. got B. get C. was getting D. had got Please don’t make so much noise. I ____. A. studying B. study C. am studying D. studied Water ____ at 100 degrees Celsius. A. boils B. boiled C. is boiling D. will boil It is raining now. It began raining two hours ago. So it ____ for two hours. A. rains B. is raining C. has been raining D. rained ____ you ____ out last night? A. Did/go B. Do/go C. Have/gone D. Were/going This house ____ 35,000 pounds in 1980. A. costs B. cost C. had cost D. was cost While Tom ____ tennis, Ann ____ a shower. A. played/took B. playing/taking C. was playing/was taking D. was play/was take I ___ the book by the time you came here last night A. finish B. finished C. had finished D. was finishing When they ____ in the garden, the phone rang. A. worked B. were working C. have worked D. are working They ____ tea when the doorbell ____. A. have/is ringing B. were having/rang C. had had/ rang D. having/ringing Father ____ his pipe while mother ____ a magazine. A. smoked/read B. had smoked/read C. was smoking/was reading D. smoking/reading When I ____ into the office, my boss was waiting for me. A. came B. was coming C. had come D. come When I saw Brian, he ____ a taxi. A. drives B. was driving C. drove D. is driving When he ____, we ____ dinner. A. arrived/having B. arrived/were having C. was arriving/had D. had arrived/had