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Опасны ли следующие реакции? Хочу провести их в дом. условиях. Ещё будет хорошо, если напишите продукты реакции, в интернете разные версии (если такие вообще существуют) И реакции чтобы проходили без каких-либо условий(по поводу 4 кажется, что все же условии нужны какие-либо)
NaHCO3 + H2O2
C6H8O7 + NaCl
C6H8O7 + H2O2
CH3COOH + C6H8O7-
Предмет:
Химия -
Автор:
bubblegumuklh - 5 лет назад
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Ответы 1
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Ни одна из реакций не пойдет, ибо:
1. сода реагирует с некоторыми солями, кислотами и щелочами, а перекись - окислитель. В соде - нечего окислять
2. лимонная кислота - слабая органическая кислота, а хлорид натрия - соль сильной кислоты, а слабые кислоты не вытесняют сильные
3. перекись с органической кислотой один на один не реагирует
4. уксус и лимонная кислота - слабые органические кислоты, а значит, они не реагируют друг с другом, поскольку кислоты друг с другом не взаимодействуют
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Автор:
brileyxcur - 5 лет назад
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5 - 9 классыАнглийский язык 6+3 б
Раскройте скобки, употребляя глаголы в Past Simple или Past Perfect.
1. Tom (to return) from the cinema at five o'clock.
2. Tom (to return) from the cinema by five o'clock.
3. I (to finish) my homework at seven o'clock.
4. I (to finish) my homework by seven o'clock.
5.He (to think) that he (to lose) the money.
6. Ann (to tell) me that she (to see) an interesting film.
7. When I (to come) home, mother already (to cook) dinner.
8. When father (to return) from work, we already
(to do) our homework.
9. When the teacher (to enter) the classroom, the pupils already (to open) their books.
10. Kate (to give) me the book which she (to buy) the day before.
11. Nick (to show) the teacher the picture which he (to draw).
12. The boy (to give) the goats the grass which he (to bring) from the field.
13. Mother (to see) that Nick (not to wash) his hands.
14. The teacher (to understand) that Lena (not to do) her homework.
15. I (to know) that my friend (not yet to come).
16. When I (to wake) up yesterday, father already (to go) to work.
17. Nick (to think) that his father (not yet to come) home.
18. Mary (to tell) us that she (to cook) a good dinner.
19. Yesterday I (to find) the book which I (to lose) in summer.
20. When we (to come) to the station, the train already (to leave).
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AnnaShornikova
AnnaShornikova Середнячок
1. Returned
2. Had returned
3. Finished
4.had finished
5. Thought, had lost
6. Told, had seen
7. Came, had already cooked
8. Returned, had already done
9. Entered, had already opened
10. Gave, had bought
11. Showed, had drawn
12. Gave, had brought
13. Saw, hadn't washed
14. Understood, hadnt done
15. Knew, hadn't come yet
16. Woke up, had already gone
17. Thought, hadn't come home yet
18. Told, had cooked
19. Found, had lost
20. Came, had already left
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irinasin4
Irinasin4 Светило науки
1. Tom returned from the cinema at five o'clock.
2. Tom had returned from the cinema by five o'clock.
3. I finished my homework at seven o'clock.
4. I had finished my homework by seven o'clock.
5.He thought that he had lost the money.
6. Ann told me that she had seen an interesting film.
7. When I came home, mother had already cooked dinner.
8. When father returned from work, we had already done
our homework.
9. When the teacher entered the classroom, the pupils had already opened their books.
10. Kate gave me the book which she had bought the day before.
11. Nick showed the teacher the picture which he had drawn .
12. The boy gave the goats the grass which he had brought from the field.
13. Mother saw that Nick had not washed his hands.
14. The teacher understood that Lena had not done her homework.
15. I knew that my friend had not come yet.
16. When I woke up yesterday, father had already gone to work.
17. Nick thought that his father had not come home yet.
18. Mary told us that she had cooked a good dinner.
19. Yesterday I found the book which I had lost in summer.
20. When we came to the station, the train had already left. ПОМОГИТЕ НУЖЕН ПЕРЕВОД ПОЖАЛУЙСТА СРОЧНО-
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