1) 4Au + 8NaCN + 2H2O + O2 = 4Na[Au(CN)2] + 4NaOH, с балансом:
Au -e- = Au+ | 1 | 4 |
O2 +4e- = 2(O)-2 | 4 | 1 |;
2) 2Na[Au(CN)2] + Zn = Na2[Zn(CN)4] + 2Au:
Au+ +e- = Au | 1 | 2 |
Zn -2e- = Zn+2 | 2 | 1 |.
1) 4Au + 8NaCN + 2H2O + O2 = 4Na[Au(CN)2] + 4NaOH, с балансом:
Au -e- = Au+ | 1 | 4 |
O2 +4e- = 2(O)-2 | 4 | 1 |;
2) 2Na[Au(CN)2] + Zn = Na2[Zn(CN)4] + 2Au:
Au+ +e- = Au | 1 | 2 |
Zn -2e- = Zn+2 | 2 | 1 |.