hoa hoc 8

H

hankitalee

M

minhvunguyetanh@gmail.com

2Al + 6HCl => 2AlCl3 +3H2
x 3x x 1.5x (mol)
Zn + 2HCl => ZnCl2 + H2
x 2x x x (mol)
=> 1.5x +x=13.44/22.4=0.6
=>x=0.4(mol)
 
W

whitetigerbaekho

Gọi số mol 2 kim lạoi là x
$2Al + 6HCl -> 2AlCl_3 +3H_2$
x---------3x-------------------1,5x
$Zn + 2HCl => ZnCl_2 + H_2$
x---------2x----------------x
Có $n_{H_2}$= 1,5x +x=13.44/22.4=0.6
=>x=0,24(mol)
m hỗn hợp kim loại =22,08
$n_{HCl}$=5x=1,2 mol
$m_{HCl}$=43,8 gam
 
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