Hoàn thành sơ đồ phản ứng ghi rõ điều kiện nếu có 1, Al-AlCl3-Al(OH)3-NaAlO2-Al(OH)3-Al2O3
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`a)`
`FeCl_3 + 3KOH -> Fe(OH)_3 + 3KCl`
`2Fe(OH)_3 -> (t^o) Fe_2O_3 + 3H_2O`
`Fe_2O_3 + 3CO -> (t^o) 2Fe + 3CO_2`
`3Fe + 2O_2 -> (t^o) Fe_3O_4`
`b)`
`2Al + 6HCl -> 2AlCl_3 + 3H_2O`
`AlCl_3 + 3KOH -> Al(OH)_3 + 3KCl`
`2Al(OH)_3 -> (t^o) Al_2O_3 + 3H_2O`
`2Al_2O_3 -> (đpnc, Criolit) 4Al + 3O_2`
Bs đề câu a: \(Fe_2O_3\xrightarrow{(4)}Fe\)
\(a,(1)2Fe+3Cl_2\xrightarrow{t^o}2FeCl_3\\ (2)FeCl_3+3NaOH\to Fe(OH)_3\downarrow+3NaCl\\ (3)2Fe(OH)_3\xrightarrow{t^o}Fe_2O_3+3H_2O\\ (4)Fe_2O_3+3CO\xrightarrow{t^o}2Fe+3CO_2\)
\(b,(1)4Al+3O_2\xrightarrow{t^o}2Al_2O_3\\ (2)Al_2O_3+6HCl\to 2AlCl_3+3H_2\\ (3)AlCl_3+3NaOH\to Al(OH)_3\downarrow+3NaCl\\ (4)2Al(OH)_3\xrightarrow{t^o}Al_2O_3+3H_2O\)
\(2Al+3H_2SO_4\to Al_2(SO_4)_3+3H_2\\ Al_2(SO_4)_3+3BaCl_2\to 2AlCl_3+3BaSO_4\downarrow\\ AlCl_3+3NaOH\to Al(OH)_3\downarrow +3NaCl\\ 2Al(OH)_3\xrightarrow{t^o}Al_2O_3+3H_2O\\ 2Al_2O_3\xrightarrow{đpnc}4Al+3O_2\)
\(\left(1\right)2Al_2O_3\xrightarrow[Na_3AlF_6]{đpnc}4Al+3O_2\uparrow\)
\(\left(2\right)2Al+3H_2SO_4--->Al_2\left(SO_4\right)_3+3H_2\uparrow\)
\(\left(3\right)Al_2\left(SO_4\right)_3+3BaCl_2--->3BaSO_4\downarrow+2AlCl_3\)
\(\left(4\right)AlCl_3+3NaOH--->Al\left(OH\right)_3\downarrow+3NaCl\)
Al + 3/2 Cl2 => AlCl3
AlCl3 + 3NaOH => Al(OH)3 + 3NaCl
Al(OH)3 + NaOH => NaAlO2 + 2H2O
NaAlO2 + HCl + H2O => Al(OH)3 + NaCl
2Al(OH)3 => Al2O3 + 3H2O