Question

Hoàn thành dãy biến hóa sau:
Al ––> Al2(SO4)3 ––> AlCl3 ––> Al(OH)3 ––> Al2O3

Answer 1

Al+H2SO4 -> Al2(SO4)3+ H2 \(\uparrow\)

Al2(SO4)3 +HCl -> AlCl3+ H2SO4

AlCl3 +Ca(OH)2 -> Al(OH)3 +CaCl2 

Al(OH)3 - to> Al2O3 +H20

Answer 2

\(2Al+3H_2SO_4\to Al_2(SO_4)_3+3H_2\\ Al_2(SO_4)_3+3BaCl_2\to 3BaSO_4\downarrow+2AlCl_3\\ AlCl_3+3NaOH\to Al(OH)_3\downarrow+3NaCl\\ 2Al(OH)_3\xrightarrow{t^o} Al_2O_3+3H_2O\)

Answer 3

Al+H2SO4 -> Al2(SO4)3+ H2 

↑

 

Al2(SO4)3 +HCl -> AlCl3+ H2SO4

 

AlCl3 +Ca(OH)2 -> Al(OH)3 +CaCl2 

 

Al(OH)3 - to> Al2O3 +H20