Question

1)CuSo4→ Cu(OH)2→ CuCl2→ Fe2O3
2)Al2O3→ Al2(SO4)3→ Al(OH)3

Answer 1

1)CuSO4+2KOH-Cu(OH)2+K2SO4
Cu(OH)2+2HCl-CuCl2+H2O
3CuCl2+2Fe(OH)3-H2Cu3Cl2+Fe2O3
2)Al2O3+3H2SO4-Al2(SO4)3+3H2O
Al2(SO4)3+2KOH-Al2(OH)3+K2SO4