: , .
: , , CuSO4, BaCl2, Al2(SO4)3, Na2S.
ó - ,
.
, , , , .
, 䳿 .
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( 4.1)
| . 1. H2CO3; H2S; HNO2; HClO; HCN; H2SiO3. 2. , NH4OH. | H2SO3; H3PO4 | . 1. H2SO4; HNO3; HCl; HI; HBr; HClO4; HMnO4. 2. - . 3. . |
3 :
1. ѳ (Na2CO3)
Na2 CO3 + H OH= NaOH + Na HCO3
CO32- + H2O = HCO3- + OH-
pH > 7
2. ѳ (CuCl2)
Cu Cl2 + H OH = HCl + CuOHCl
Cu2+ + H2O = CuOH+ + H+
< 7
3. ѳ (MgS)
MgS + 2HOH = Mg (OH)2 + H2S
Mg2+ + S2- + H2O = Mg(OH)2 + H2S
=7
: KCl, NaNO3, NaCl, Na2SO4, K2SO4.
ճ
1.
2-3 Al2(SO4)3 ( ). , .
2.
2-3 Na2S ( ). , .
3.
2-3 BaCl2 (NH4)CO3 ( ). , .
:
| ѳ | |||
| Al2(SO4)3 | |||
| Na2S | |||
| BaCl2 | |||
| (NH4)2CO3 |
4.
.
.
1. , , .
( 4.2)
| / | 1 |
| MnCl2, Na2CO3, Ni(NO3)2. | |
| K2S, CrCl3, KCl. | |
| Al2(SO4)3, K2S, Pb(NO3)2. | |
| FeCl3, Na2CO3, Al2S3. | |
| Li2S, AlCl3, NiSO4. | |
| Pb(NO3)2, Na2CO3, CoCl2. | |
| FeCl3; NaCl; Al(NO3)3. | |
| FeSO3; K2SO3; Hg(NO3)2. | |
| ZnCl2; Na2S; CaSiO3. | |
| Ag3PO4; Na3PO4; NaNO3. | |
| KCN; K2S; CaSO3. | |
| BaCl2; K2CO3; K2 S. | |
| Na2S; NaNO3; (NH4)2 SO4. | |
| KCl; Cu(NO3)2; K2CO3. | |
| AgNO3; NaNO3; Na2SiO3. |
|
|
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