: Na2S2O3 + H2SO4 → Na2SO4 + S + SO2 + H2O
, ( ) ( ). .
:
1. , , .
2. . , .
| V (Na2S2O3) | V (H2O) | V (H2SO4) | () | ( ), c-1
| |
| 1 | 5 | 10 | 5 | ||
| 2 | 10 | 5 | 5 | ||
| 3 | 15 | 0 | 5 |
3. Na2S2O3 . .
4. , , .
5. . Na 2 S 2 O 3 , .
| V (H2SO4) | V (H2O) | V (Na2S2O3) | () | (), c-1
| |
| 1 | 5 | 10 | 5 | ||
| 2 | 10 | 5 | 5 | ||
| 3 | 15 | 0 | 5 |
6. . .
7. .
2: .
1. .
FeCl3 KSCN :
FeCl3 + 3KSCN ↔ Fe(SCN)3 + 3Kl
. . . .
:
1. 5 FeCl3 ( = 0,02 /) 5 KSCN ( = 0,02 /). - .
2. 4 . .
3. 3-4 KSCN .
4. 3-5 FeCl3.
5. Kl.
6. .
7. .
| 1 | - | - | |
| 2 | KSCN | ||
| 3 | FeCl3 | ||
| 4 | KCl |
8. .
|
|
|
