Cho 4,48 lít ở điều kiện tiêu chuẩn tác dụng với 200 ml dung dịch Ca(OH)₂ lần thu được CaCO₃ và H₂O

a) Tính nồng độ mol của Ca(OH)2

b) tính khối lượng kết tủa tạo thành

bài 3 :nhận biết

+ Các chất rắn màu trắng sau P₂0₅ ; Na₂O và Al₂O₃

+ Các chất khí không màu CO₂ ; N₂O

+ Các dung dịch không màu KOH ; HCl ; Na₂SO₄

Nêu hiện tượng trong các thí nghiệm sau

+ thí nghiệm 1 cho đinh sắt vào dung dịch HCl

+ thí nghiệm 2 cho nước vào P2O5 và thử bằng quỳ tím

+ TH3: cho nước vào CaO và thử bằng quỳ tím

+ thí nghiệm 4 cho sắt vào H2 SO4 đặc nguội

+ TH5 : nhỏ H2 SO4 và BaCl2

77. The board awarded th first prize to the reporter

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78. Alice didn’t make that cake

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79. They buy newspapers everywhere in the city

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80. That company will publish a textbook next year

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81. The committeee appointed Alice secretary for the meeting

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82. He hides the broken cup in the drawer

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83. They keep this room tidy all the time

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84. We gave Ann some bananas and some flowers

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85. They moved the fridge into the living rooom

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86. She bougtht some cups of tea to the visitors in the next room

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87. They find the new project worthless

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88. The secretary didn’t take note to the manager

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89. Bill will invite Ann to the party

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90. I didn’t write that letter

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1. They all voted the party a great success

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2. We gave Ann some bananas and some flowers

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3. She bought some cups of tea to the visitors in the next room

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4. They find the new project worthless

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5. The secretary didn't take the note to the manager

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6. Bill will invite Ann to the party

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7. I didn't write that letter

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8. Hundreds of people visit the White House everyday

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9. everyone doesn't know this fact very well

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10. Do you wash the didhes everyday?

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11. Shakespeare wrote that play

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12. Does Jackson give that lecture?

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13. They will send you the money at the end of the month

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14. People speak Spanish in many countries

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15. The children often read stories in the evening

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16. The club bought him 2 years ago for a fee of $20 000

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17. I'll meet her at the airport

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18. She deliers milks at about six o'clock

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19. Somebody cleans the room everyday

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20. A man asked me several diffictult questions at the interview

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Chuyển sang bị động

1. Ann had fed the cats befor she went to the cinema

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2. The students have discussed the pollution problrms sincd last week

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3. Have the thieves stolen the most valuable painting in the national museum?

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4. Some people will interview the new president on TV.

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5. Are you going to repair those shoes?

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6.He has broken his nose in a football match

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7. Have you finished the above sentences?

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8. The waiter brings me this dish

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9. Our friends send these postcards to us

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10.Their grandmother told them this story when they visited her last week

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11. Tim ordered this train ticket for his mother

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12. You didn't show me the special camaras

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13. She showed her ticket to the the airline agent

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14. He lends his friend his new shoes

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15. She left her relatives five milion pounds

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16. The shop assistant handed these boxes t the customer

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17. The board awarded the first prize to the reporter

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18. Alice didn't make that cake

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19. They buy newspapers everywhere in the city

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20. That company will publish a texbook next year

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21. The committee appointed Alice secretary for the meeting

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22. He hides the broken cup in the drawer

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DẠNG BỊ ĐỘNG

41. Have you sent the christmas cards to your family?

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42. The committee appointed Alice secretary for the meeting

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43. He hides the broken cup in the drawer

=>

44. They keep this room tidy all the time

=>

45. They all voted the party a great success

=>

46. We gave Ann some bananas and some flowers

=>

47. The moved the fridge into the living room

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48. She bought some cups of tea to the visitors in the next room

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49. The find the new project worthless

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50. My father waters this flower every morning

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51. John invited Fiona to his birthday party last night

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52. Her mother is preparing the dinner in the kitchen

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53. We should clean our teeth twice a day

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54. Our teachers have explained the english grammar

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55. Some drunk drivers caused the accident in this city

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56. Tom will visit his parents next month

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57. The manager didn’t phone the secretary this morning

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59. Did Mary this beautiful dress?

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60. Have you sent the christmas cards to your family?

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