Question

Cu-->CuSO4-->Cu(OH)2--->CuO--->Cu

Answer 1

1. 2H2SO4+CU= CUSO4+SO2+2H2O

2. CUSO4+2NAOH=CU(OH)2 + NA2SO4

3. CU(OH)2=CUO+H2O

4. CUO+H2= CU+H2O

Answer 2

Cu + 2H2SO4= CuSO4 + SO2 + 2H2O

CuSO4+2KOH= K2SO4+Cu(OH)2 (осадок)

Cu(OH)2 = CuO + H2O (нагревание идёт)

CuO + H2 = Cu + H2O.