Make up the reaction equation: CuSO4 – Cu (OH) 2 – CuO – CuCl2; Fe2O3- Fe2 (SO4) 3- Fe (OH) 3- FeCl3
June 19, 2021 | education
| 1) CuSO4 + 2КОН = Cu(OH)2↓ + К2SO4;
Сu2+ + SO42- + 2K+ + 2OH– = Cu(OH)2↓ + 2K+ + SO42-;
Сu2+ + 2OH– = Cu(OH)2↓.
Cu(OH)2↓ = CuO + Н2О;
CuO + 2HCl = CuCl2 + Н2О;
Cu2+ + O2- + 2H+ + 2Cl– = Cu2+ + 2Cl– + Н2О;
O2- + 2H+ = Н2О.
2) Fe2(SO4)3 + 6NaOH = 3Na2SO4 + Fe(OH)3↓;
2Fe3+ + 3SO42- + 6Na+ + 6OH– = 6Na+ + 3SO42- + Fe(OH)3↓;
2Fe3+ + 6OH– = Fe(OH)3↓.
2Fe(OH)3 = Fe2O3 + 3H2O;
Fe2O3 + 6HCl = 2FeCl3 + 3H2O;
2Fe3+ + 3O2- + 6H+ + 6Cl– = 2Fe3+ + 6Cl– + 3H2O;
3O2- + 6H+ = 3H2O.
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