Cu –>CuO –> CuSO4 –> CuCl2 –> Cu(NO3)2 –> Cu(OH)2 –> CuO –> Cu Al –> Al2O3 –> AlCl3 –> Al(OH)3 –> Al2O3 –> Al –> NaAlO2 30/10/2021 Bởi Rose Cu –>CuO –> CuSO4 –> CuCl2 –> Cu(NO3)2 –> Cu(OH)2 –> CuO –> Cu Al –> Al2O3 –> AlCl3 –> Al(OH)3 –> Al2O3 –> Al –> NaAlO2
Đáp án: a)2Cu +O2 -(to)->2 CuO CuO+H2SO4→CuSO4 + H2O CuSO4+BaCl2→ CuCl2+BaSO4↓ CuCl2+2AgNO3→Cu(NO3)2+2AgCl↓ Cu(NO3)2+NaOH→Cu(OH)2↓+2NaNO3 Cu(OH)2→CuO+H2O CuO+CO→Cu+CO2 b)4Al+3O2→2Al2O3 Al2O3+6HCl→2AlCl3+3H2↑ AlCl3+3NaOH(vừa đủ) →Al(OH)3+3NaCl 2Al(OH)3→Al2O3+3H2O 2Al2O3-(đpnc)->4Al+3O2↑ 2Al+2NaOH+2H2O→2NaAlO2+3H2↑ Giải thích các bước giải: Bình luận
Cu+1/2O2-to->CuO CuO+H2SO4->CuSO4+H2O CuSO4+BaCl2->CuCl2+BaSO4 CuCl2+2AgNO3->Cu(NO3)2+2AgCl Cu(NO3)2+2NaOH->Cu(OH)2+2NaNO3 Cu(OH)2-to->CuO+H2O CuO+H2-to->Cu+H2O 2Al+3/2O2-to->Al2O3 Al2O3+6HCl->2AlCl3+3H2O AlCl3+3NaOH->3NaCl+Al(OH)3 2Al(OH)3-to->Al2O3+3H2O Al2O3-đpnc,xt->2Al+3/2O2 Al+NaOH+H2O->NaAlO2+3/2H2 Bình luận
Đáp án:
a)2Cu +O2 -(to)->2 CuO
CuO+H2SO4→CuSO4 + H2O
CuSO4+BaCl2→ CuCl2+BaSO4↓
CuCl2+2AgNO3→Cu(NO3)2+2AgCl↓
Cu(NO3)2+NaOH→Cu(OH)2↓+2NaNO3
Cu(OH)2→CuO+H2O
CuO+CO→Cu+CO2
b)4Al+3O2→2Al2O3
Al2O3+6HCl→2AlCl3+3H2↑
AlCl3+3NaOH(vừa đủ) →Al(OH)3+3NaCl
2Al(OH)3→Al2O3+3H2O
2Al2O3-(đpnc)->4Al+3O2↑
2Al+2NaOH+2H2O→2NaAlO2+3H2↑
Giải thích các bước giải:
Cu+1/2O2-to->CuO
CuO+H2SO4->CuSO4+H2O
CuSO4+BaCl2->CuCl2+BaSO4
CuCl2+2AgNO3->Cu(NO3)2+2AgCl
Cu(NO3)2+2NaOH->Cu(OH)2+2NaNO3
Cu(OH)2-to->CuO+H2O
CuO+H2-to->Cu+H2O
2Al+3/2O2-to->Al2O3
Al2O3+6HCl->2AlCl3+3H2O
AlCl3+3NaOH->3NaCl+Al(OH)3
2Al(OH)3-to->Al2O3+3H2O
Al2O3-đpnc,xt->2Al+3/2O2
Al+NaOH+H2O->NaAlO2+3/2H2