ó .
ò˲ 䳿 , () .
:
Pb(NO3)2 + H2O Pb(OH)(NO3) + HNO3
Na2HPO4 + H2O NaH2PO4 + NaOH
. , . ().
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þ ò˲
.
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Thorn; ˲ֲ
, .
þ
.
1. , , , ( >7).
: Na2CO3; CH3COONa; KCN; Na2S; K2SiO3
:
K2SiO3 +2H2O = 2 + H2SiO3
2K+ + SiO32 + 2H2O = 2K+ + 2 + H2SiO3¯
SiO32 + 2H2O = 2 + H2SiO3
: 1. Ͳ .
2. >7, .
Uuml; , , 볭 .
2. , , , <7.
:
A12(SO4)3; FeCl3; CuBr2; NH4C1; Zn(NO3)2; (N4)2Cr2O7.
:
FeCl3 + 32 = Fe(OH)3 + 3Cl
Fe3+ + 3l + 3H2O = Fe(OH)3 + 3H+ + 3l
Fe3++ 3H2O = Fe(OH)3¯ + 3H+
: 1. Ҳ ˲
2. H<7, .
Uuml; ˳, , .
3. , , , , ≈7.
: A12S3; Cr2S3; CH3COONH4; (NH4)2CO3.
:
(N4)23 + 22 = 2NH4OH + 23
2NH4+ + O32 + 22 = 2NH3 + 2 + 32
: 1. Ҳ Ͳ ˲
2. = 7. .
, .
A12S3 + 6H2O = 21()3¯ + 3H2S
, " ", , :
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2A1 + 3S = A12S3
, .
uuml; , , - .
4. 䭭 , (!) , =7.
NaCl, K2SO4, 2r27, Ba(NO3)2 .
NaCl + 2 = NaOH + HC1
Na+ + l + 2 = Na+ + + + + l
2 = + +