1) Zn -2e- = Zn2+ | 2 | 3 |
| 6 |
(NO3)- +3e- + 4H+ = NO + 2H2O | 3 | 2 |,
3Zn + 2(NO3)- + 8H+ = 3Zn2+ + 2NO + 4H2O,
3Zn + 8HNO3 = 3Zn(NO3)2 + 2NO + 4H2O;
2) Sn2+ -2e- + 6OH- = (SnO3)2- + 3H2O | 2 | 3 |
Bi3+ +3e- = Bi | 3 | 2 |,
3Sn2+ + 2Bi3+ + 18OH- = 3(SnO3)2- + 2Bi + 9H2O,
3SnCl2 + 2BiCl3 + 18KOH = 3K2SnO3 + 2Bi + 12KCl + 9H2O.
1) Zn -2e- = Zn2+ | 2 | 3 |
| 6 |
(NO3)- +3e- + 4H+ = NO + 2H2O | 3 | 2 |,
3Zn + 2(NO3)- + 8H+ = 3Zn2+ + 2NO + 4H2O,
3Zn + 8HNO3 = 3Zn(NO3)2 + 2NO + 4H2O;
2) Sn2+ -2e- + 6OH- = (SnO3)2- + 3H2O | 2 | 3 |
| 6 |
Bi3+ +3e- = Bi | 3 | 2 |,
3Sn2+ + 2Bi3+ + 18OH- = 3(SnO3)2- + 2Bi + 9H2O,
3SnCl2 + 2BiCl3 + 18KOH = 3K2SnO3 + 2Bi + 12KCl + 9H2O.