Предмет: Химия, автор: agab112

Второе задание пожалуйста

Приложения:

Ответы

Автор ответа: Murosakibara
0

а)S + 2HNO3 = H2SO4 + 2NO востановительное свой-во серы

если тебе нужно обьяснить то в первом случае сера была с нулевой степенью окисления, стала +4. Она стала восстановителем. Во второй реакции была нулевой, стала -3, т.е. является окислителем,ну и следоватьельно правильный ответ а)

Автор ответа: хихимик
0

S+ O2 = SO2

Здесь сера была в степени окисления 0, а стала +4, т.е. она отдала электроны, значит она в этой реакции восстановитель

 

 

3S + 2Al = Al2S3

простые вещества металлы - только восстановители. Они только отдают электроны. Значит сера принимает электроны,она окислитель, была в степени окисления 0, а стала -2.

Похожие вопросы
Предмет: Английский язык, автор: oleg0302
Упр. 119. Раскройте скобки, употребляя глаголы в нужном времени.
1. Yesterday at the moment we (to start) eating, the telephone (to ring).
2. She was worried that her child (not to like) her new husband.
3. Look! Her hands (to be) dirty. She (to work) in the garden.
4. If you (not to warn) him just now, he (to fall) in the water.
5. Yesterday I (not to want) to stay late so I (to make) an excuse and (to leave).
6. My friend always (to criticise) the way I (to dress).
7. When we (to see) them last?
8. She never (to want) to commit herself to six years of study.
9. If you (to come) at six tomorrow,, you (to find) him at home.
10. If you (to know) her address, you (to send) her a letter today.
11. I know what kind of person she is. She always (to say) that she never (to tell) a soul but then she (to break) her promise.
12. This letter (to be) from John. We (to stay) with him last summer.
13. I (to meet) them when they (to run) round the park.
14. When they (to go) out, the rain (to stop), but a strong wind (to blow).
15. Look at him! He never (to be) so insulted!
16. It (to be) dark now. The sun (not to rise) yet.
17. There (to be) an accident near our house last night. You (to hear) it?
18. We (not to recognize) the hotel. We (to stay) in it the year before.
19. Last year when the play (to be) first performed on stage, it (to becoine) a hit.
20. When I (to come) to my friend, his parents (to tell) me that he (to go) ten minutes before.