CrO2ˉ4 + 2 + = rO4 ↓
Cr2 O2ˉ7 + 2 2 + + H2O = 2 rO4 ↓ + 2+
Cr2 O2ˉ7 + 14 + + 6I ˉ = 2 Cr3+ + 7 H2O + 3I2
, -
-
F ˉ + 2 + = F 2↓
,
F 2 ↓ + 2+ = 2 HF + 2 +
F 2 + H2 SO4 = 2 HF + SO4↓
4HF + SiO2 = SiF4 ↑ + 2H2O
SiF4 ↑ + 3H2O = 4 HF + H2 SiO3 ↓
. H2 SO4 HF, SiF4, - H2 SiO3
F ˉ + 2 + = F 2↓
, Fe (III) [Fe F 6 ] 3ˉ
3 F 2↓ + Fe 3+ = [Fe F 6 ] 3ˉ + 3 2 +
Zr - + 6 F ˉ = [ Zr F 6 ] 2ˉ +
- , - [ Zr F 6 ] 2ˉ. ( ).
II
-
Cl ˉ + Ag + = AgCl↓
,
AgCl↓ + 2 NH 3 * H2O = [ Ag(NH 3) 2 ] + + Cl ˉ + H2O
2 Cr2 O7 +4Na Cl +3 H2 SO4 = 2 Cr O2Cl2↑+2Na2 SO4 + K2 SO4+3H2O
. 2 Cr2 O7 Cr O2Cl2. - , .
-
Brˉ + Ag + = AgBr↓
- ,
AgBr↓ + 2 NH 3 * H2O = [ Ag(NH 3) 2 ] + + Br ˉ + H2O
2Brˉ + Cl 2 = Br 2 + 2Cl ˉ
- ( , , Mn O4) , - .
-
I ˉ + Ag + = AgI↓
-
I ˉ + Pb 2 + = Pb I 2 ↓
3. *
|
|
|
2I ˉ + Cl 2 = I 2 + 2Cl ˉ
, - . .
I 2 + 6 H2O + Cl 2 = 2I 3 ˉ + 1 2 + + 10Cl ˉ
Fe 3 +, NOˉ2 , .. .
2I ˉ + Fe 3+ = I 2 + Fe 2+
-
S 2 ˉ + 2Ag + = Ag 2 S↓
S 2 ˉ + 2 + = 2 S↑
2 S↑ + Pb 2 + = Pb S ↓ + 2 +
, , .
S 2 ˉ + [Fe(CN) 5 NO] 2 ˉ = [Fe(CN) 5 NOS] 4 ˉ
-
S 2 ˉ + Cd 2 + = CdS ↓
III
-
1. Fe 2+
NO3ˉ + 3 Fe 2+ + 4 + = 3Fe 3+ + NO + 2H2O
Fe 2+ + NO + SO2ˉ4 = [Fe(NO)] SO4
[Fe(NO)] SO4 .
- , . .
3. C6H5 NO2
. . - .
-
NO2ˉ + + = NO2
2NO2 = NO2 ↑ + NO ↑ + H2O
, .
2NO2ˉ + 4 + + 2I ˉ = I 2 +2NO ↑ + 2H2O
, - .
