ò ӻ
: - H2O2; H2O2; .
: , , H2O2, KI, KMnO4, H3OOH, H2SO4.
1 H2O2
KI, , H2O2 (3%):
KI + H3OOH + H2O2 = H3OOK + I2 + H2O
- . I2?
________________
H2O2 ?
_____________________
2 ³ KMnO4
KMnO4, , H2O2:
KMnO4 + H2O2 + H2SO4 → ___________________________________
_______________________________________________________________________
. H22 ?
___________________________________________________________________________
H2O2 - ?
________________
3 H2O2
H2O2 H2SO4 (), H2O2 :
KI + H2O2 + H2SO4 →______________________________________
________
, . .
__________________________________________________________________________________________
1 22.
2 22.
3 Գ 22.
4 22; 22; 22 .
5 , 22 . - , 22.
6 ϳ :
H2S + 22 = H2SO4 + 2
22 + HIO3 = I2 + O2 + 2
3
: ò
(Ѳ) ԲIJ»
: .
: . Br2,: H2SO4, K2r2O7, CuSO4, FeSO4, MnSO4.
1 H2S
) () , 2 . . . , :
|
|
FeS + HCl →________________________________________
) H2S , ( ). H2S .
H2S? . ?
______________________________________________________________________________________
2 ³ H2S
) KMnO4, , H2S:
KMnO4 + H2S + H2SO4 →______________________________________
______________________________________________________________________
) K2Cr2O7, , H2S:
K2Cr2O7 + H2S + H2SO4 → __________________________________
_________
, H2S. H2S?
___________________________
3
: Pb(NO3)2, CuSO4, FeSO4, MnSO4, CdSO4 H2S ( H2S↑). , . :
Pb(NO3)2 + H2S → _________________________________________
_______________________________________________________________________
CuSO4 + H2S → __________________________________________
________
FeSO4 + H2S → __________________________________________
_______________________________________________________________________
MnSO4 + H2S → ___________________________________________
__________
CdSO4 + H2S → _________________________________________
__________
. ?
_________________
4 ó
Na2S . .
:
Na2S + H2O → _______________________________________
____________________________________________________________________
, .
______________________________________________________________________________________
1 S .
2 H2S.
3 2S ?
4 2S 䳿 ? , .
5 ³ 2S?
6 , , .
7 , 䳿 .
|
|
8 .
9 .
10 :
S → FeS → H2S → K2S →KHS
4
: (V) ,
Բί , ԲҲ»
: (V) .
: , , , H2S4, Na2SO3, H2S, KMnO4.