Question

Cho các chất Nacl,H2o,Mg,Fes2,Al hãy điều chế a) NAoh,b)MG(OH)2,c)AL(OH)3,d)Al2O3,e)Fe(OH)3

Answer 1

a)

$2NaCl + 2H_2O \xrightarrow{dpdd,cmn} 2NaOH + H_2 + Cl_2$

b)

$Cl_2 + H_2 \xrightarrow{as} 2HCl$
$Mg + 2HCl \to MgCl_2 + H_2$
$MgCl_2 + 2NaOH \to Mg(OH)_2 + 2NaCl$

c)

$2Al + 6HCl \to 2AlCl_3 + 3H_2$
$AlCl_3 + 3NaOH \to Al(OH)_3 + 3NaCl$

d)

$2H_2O \xrightarrow{đp} 2H_2 + O_2$

$4FeS_2 + 11O_2 \xrightarrow{t^o} 2Fe_2O_3 + 8SO_2$
$Fe_2O_3 + 6HCl \to 2FeCl_3 + 3H_2O$
$FeCl_3 + 3NaOH \to Fe(OH)_3 + 3NaCl$