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Broxxi
04.10.2022 03:50
Химия
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1. I (to write) an English exercise now. 2. I (to write) an English exercise at this time yesterday.
3. My little sister (to sleep) at this time tomorrow.
4. My friends (not to do) their homework now. They (to play) volleyball.
5. My friends (not to do) their homework at seven o'clock yesterday. They (to play)
volleyball.
6. She (to read) the whole evening yesterday.
7. Look! My cat (to play) with a ball.
8. When I went out into the garden, the sun (to shine) and birds (to sing) in the
trees.
9. When you come to my place tomorrow, I (to read) your book.
10.I (to watch) TV the whole evening next Sunday..​

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Ответы на вопрос:

UltimatumRenata
UltimatumRenata
4,6(79 оценок)

H2SO4 ↔H(+) + HSO4(-)

HSO4(-) ↔H(+) + SO4(2-)

Молекулярное уравнение:

Na3PO4 + HOH ⇄ Na2HPO4 + NaOH

Полное ионное уравнение:

3Na+ + PO43- + HOH ⇄ 2Na+ + HPO42- + Na+ + OH-

Краткое ионное уравнение:

PO43- + HOH ⇄ HPO42- + OH-

Доля разложившегося HI: а = 2Х/[HI]0

[HI] = [HI]0 - 2Х = 2Х/а - 2Х = 2Х(1/а - 1)

К = X2 / [HI]2 = 1/4 * а2/(1-а)2 = 6,25·10-2.

ZnBr2 диссоциирует в одну ступень, т.к. средняя соль

ZnBr2 = Zn(2+) + 2Br(-)

Ва (ОН) 2 = Ва2+ + 2ОН- - суммарное уравнение  

Ступенчатая диссоциация этого 2-кислотного основания:  

Ba(OH)2 = ВаОН+ + ОН-  

ВаОН+ = Ва2+ + ОН-  

K2SO4 = 2K(+) + SO4(2-)

Cr(NO3)3=Cr+3NO3

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