1. 2Сu + O2 =t=> 2CuO
2. CuO+H2SO4 =>CuSO4+H2O
CuSO4 + 2KOH=> Cu(OH)2↓+K2SO4
3. Cu(OH)2+H2SO4 = CuSO4 + 2H2O
4. CuSO4 + Fe = Cu↓+FeSO4
Удачи!
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Answers & Comments
1. 2Сu + O2 =t=> 2CuO
2. CuO+H2SO4 =>CuSO4+H2O
CuSO4 + 2KOH=> Cu(OH)2↓+K2SO4
3. Cu(OH)2+H2SO4 = CuSO4 + 2H2O
4. CuSO4 + Fe = Cu↓+FeSO4
Удачи!