Trộn 20ml dd KCl 0,05Mvới 20ml dd H2SO4 0,075M. Nếu coi thể tích sau khi pha trộn bằng thể tích của hai dung dịch đầu thì pH của dung dịch thu được là:

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REPORTED SPEECH I. Rewrite these sentences: 1. Minh said:” Please buy me a new book, Mom.” .......................................................................................................................................... ............... 2. Hoa said to her brother:” Please help me with my homework.” .......................................................................................................................................... ............... 3. I said:” Open your book, please, Miss Nga.” .......................................................................................................................................... ............... 4. Mr An said:” Please don’t make noise in class, Tom.” .......................................................................................................................................... ............... 5. “Keep quiet during class time, Hoa” said Nam .......................................................................................................................................... ............... 6. He said:” Can you give me a pen , Tom.” .......................................................................................................................................... ............... 7. “Can you help me with my homework tomorrow? Hoa” Anh said .......................................................................................................................................... ............... 8. “Can you turn off the TV, Marry” I said .......................................................................................................................................... ............... 9. “ Can you retell the story, Hoa” Lan said .......................................................................................................................................... ............... 10. She asked Binh:” Could you show me the way to Hoi An, please.” .......................................................................................................................................... ............... 11. He said:’ Tan , you should practice speaking English everyday.” .......................................................................................................................................... ............... 12. She said:” We should read this sentence more carefully, Hung.” .......................................................................................................................................... ............... 13. “You should prepare your lesson before going to school, Na.” Tam said .......................................................................................................................................... ...............