?
.

?
.

5

- , . . , .

 

2KOH + H2SO3 = K2SO3 + 2H2O 2OH- + H2SO3 = 2H2O + SO32

K2SO3+ H2O = KOH + KHSO3 SO32- + HOH = HSO3- + OH-

 

(+ -) . + , , + - .

, "" "" .

( ). 3. 3 + + . - () (+) - (CHCOOH), , , + ( ), pH >7.

3 + H2O + 3

+ + 3 + K+ + + 3

3 + + 3

Na2S . . S2 + , .

1- S2− + HS +

Na2S + 2 NaHS + NaOH

, , , , , .

2- HS+ H2S +

NaHS + 2 NaOH + H2S

( ). NH4Cl (NH4H - , l - ). l, , :

NH4+ + NH4OH + +

NH4Cl + 2 NH4OH + l

, , + c pH <7.

Zn(NO3)2 .

1- Zn2+ +ZnOH+ + H+

Zn(NO3)2 + 2ZnOHNO3 + HNO3

, + .

, H+ .

2- ZnOH+ +Zn(OH)2 + H+

ZnOHNO3 + 2Zn(OH)2 + HNO3

( ). 3NH4 . , pH ≈ 7:

NH4+ + CH3COO +NH4OH + 3

, , .