HOÀN THÀNH CÁC PT PỨNG VÀ GHI GÕ ĐIỀU KIỆN XẢY RA: Cu  → CuO → CuCl2 →Cu(OH)2 → CuSO4→ Cu  Fe → FeCl2→ Fe(NO3)2→Fe(OH)2→Fe203 GIÚP EM VỚI Ạ EM CẢM ƠN RẤT NHIỀU

2 câu trả lời

Đáp án:

 

Giải thích các bước giải:

 a) 

2Cu + `O_2` $\xrightarrow[]{t°}$ 2CuO 

CuO + 2HCl → `CuCl_2` + `H_2O`

`CuCl_2` + 2NaOH → `Cu(OH)_2` + 2NaCl 

`Cu(OH)_2` + `H_2SO_4` → `CuSO_4` + 2`H_2O`

`CuSO_4` + Zn → `ZnSO_4` + Cu

b)

Fe + 2HCl → `FeCl_2` + `H_2`

`FeCl_2` + 2`AgNO_3` → `Fe(NO_3)_2` + 2`AgCl`

`Fe(NO_3)_2` + 2NaOH → `Fe(OH)_2` + 2`NaNO_3`

4`Fe(OH)_2`  + `O_2` $\xrightarrow[]{t°}$ 2`Fe_2O_3` + 4`H_2O`

Chúc bạn học tốt #aura

`a/` 

- `2Cu``+``O_2` $\xrightarrow[]{t^o}$ `2CuO`

- `CuO``+``2HCl``→``CuCl_2``+``H_2O`

- `CuCl_2``+``2NaOH``→``Cu(OH)_2``+``2NaCl`

- `Cu(OH)_2``+``H_2``SO_4``→``CuSO_4``+``2H_2O`

- `Fe``+``CuSO_4``→``FeSO_4``+``Cu`

`b/`

- `Fe``+``2HCl``→``FeCl_2``+``H_2`

- `FeCl_2``+``2AgNO_3``→``2AgCl↓``+``Fe(NO_3)_2`

- `Fe(NO_3)_2``+``2NaOH``→``Fe(OH)_2``+``2NaNO_3`

- `4Fe(OH)_2``+``O_2` $\xrightarrow[]{t^o}$ `2Fe_2``O_3``+``4H_2O`

Câu hỏi trong lớp Xem thêm

1. If I were you, I __________ for a new car to buy. A. would look B. will look C. look D. looking 2. If Trang __________ ill, she would go out with us. A. isn’t B. aren’t C. wasn’t D. not been 3. If there __________ fewer cars on the road, there would be less accident. A. is B. were C. are D. be 4. If people really cared about environment, they __________ waste into rivers. A. didn’t dump B. don’t dump C. shan’t dump D. wouldn’t dump 5. You __________ so tired if you went to bed earlier. A. won’t be B. shan’t be C. couldn’t be D. wouldn’t be 6. If you really __________ me, you would buy me a diamond ring. A. loved B. love C. loves D. loving 7. If I knew where she lived, I __________ and see her. A. will go B. would go C. should go D. went 8. If I __________ taller, I would buy this dress. A. am B. are C. were D. being 9. Filters do not remove all __________ from water. A. contaminate B. contaminants C. contaminating D. contamination 10. __________ is found under the ground in soil, rocks, etc. A. sea water B. salt water C. groundwater D. hot water 11. If I won a lottery, I __________ a lot on charity. A. spend B. spent C. will spend D. would spend 12. If the supermarket is open, I __________ some food there. A. will buy B. would buy C. bought D. has bought 13. I will talk to her if you __________ to do it. A. won’t want B. didn’t want C. don’t want D. doesn’t want 14. If I __________ more money, I would buy a better car. A. have B. had C. will have D. would have 15. The farmer had put down some rat __________. A. poisoning B. poisoner C. poisoned D. poison

0 lượt xem
1 đáp án
5 phút trước