a)MnO2->Cl2->FeCl3->NaCl->HCl->CuCl2->AgCl->Ag
b)NaCl->Cl2->HCl->FeCl3->AgCl->Cl2->FeCl3->Fe(OH)3->Fe2o3->Fe->FeCl2->NaCl->NaOH->Nước Javel
a)MnO2->Cl2->FeCl3->NaCl->HCl->CuCl2->AgCl->Ag
b)NaCl->Cl2->HCl->FeCl3->AgCl->Cl2->FeCl3->Fe(OH)3->Fe2o3->Fe->FeCl2->NaCl->NaOH->Nước Javel
Đáp án:
Giải thích các bước giải:
`a,`
`MnO_2+4HCl->MnCl_2+Cl_2+2H_2O`
$3Cl_2+2Fe\xrightarrow{t^o}2FeCl_3$
`FeCl_3+3NaOH->Fe(OH)_3+3NaCl`
`2NaCl_{Rắn}+H_2SO_4_{đặc}->Na_2SO_4+2HCl`
`2HCl+CuO->CuCl_2+H_2O`
`CuCl_2+2AgNO_3->2AgCl+Cu(NO_3)_2`
$2AgCl\xrightarrow{as}2Ag+Cl_2$
`b,`
$2NaCl+2H_2O\xrightarrow{đpmn}2NaOH+Cl_2+H_2$
`Cl_2+H_2->2HCl`
`6HCl+Fe_2O_3->2FeCl_3+3H_2O`
`FeCl_3+3AgNO_3->Fe(NO_3)_3+AgCl`
$2AgCl\xrightarrow{as}2Ag+Cl_2$
$2Fe+3Cl_2\xrightarrow{t^o}2FeCl_3$
$FeCl_3+3NaOH->Fe(OH)_3+3NaCl$
$2Fe(OH)_3\xrightarrow{t^o}Fe_2O_3+3H_2O$
$Fe_2O_3+3H_2\xrightarrow{t^o}2Fe+3H_2O$
`Fe+2HCl->FeCl_2+H_2`
`FeCl_2+2NaOH->2NaCl+Fe(OH)_2`
$2NaCl+2H_2O\xrightarrow{đpmn}2NaOH+Cl_2+H_2$
`Cl_2+2NaOH->NaCl+NaClO+H_2O`
a) (1) MnO2 + 4HCl →(nhiêt đô) MnCl2 + Cl2↑ +2H2O
(2) 2Fe +3Cl2 → 2FeCl3
(3) FeCl3 + 3NaOH → Fe(OH)3↓ +3NaCl
(4) 2NaCl + H2SO4 →(≥400*C) Na2SO4 + 2HCl
(5) CuO + 2HCl → CuCl2 + H2O
(6) CuCl2 + 2AgNO3 → 2AgCl↓ + Cu(NO3)2
(7) 2AgCl → 2Ag + Cl2↑
b) (1) NaCl + 2H2O → (ĐPDD,Có màng ngăn ) 2NaOH + ↑Cl2 +H2 ↑
(2) Cl2 + H2 →(t*) 2HCl
(3) Fe + 2HCl → FeCl2 + H2↑
(4) FeCl2 + 2AgNO3 → 2AgCl↓ + Fe(NO3)2
(5) AgCl2 → 2Ag + Cl2↑
(6) 2Fe + 3Cl2 → 2FeCl3
(7) 2FeCl3 + 6NaOH → 6NaCl +2Fe(OH)3
(8) Fe(OH)3 → Fe2O3 + H2O
(9) Fe2O3 + 3H2 → 2Fe + 3H2O
(10) Fe + CuCl2 → FeCl2 +Cu
(11) 3FeCl2 + 6NaOH → 2Fe(OH)3 + 6NaCl
(12) NaCl +KOH → NaOH +KCl+KClO
(13) Cl2 + 2NaOH → ( NaCl + NaClO +H20) ←Nước Javen