2Al +6HCl ----->2AlCl3 +3H2(1)
Al2O3 +6HCl----->2AlCl3 +3H2O(2)
Ta có
n\(_{H2}=\frac{13,44}{22,4}=0,6\left(mol\right)\)
Theo pthh
n\(_{Al}=\frac{2}{3}n_{H2}=0,4\left(mol\right)\)
m\(_{Al}=0,4.27=10,8\left(g\right)\)
m\(_{Al2O3}=21-10,8=10,2\left(g\right)\)
Ta có
n\(_{Al2O3}=\frac{10,2}{102}=0,1mol\)
n\(_{HCl\left(2\right)}=6n_{Al}=0,6\left(mol\right)\)
n\(_{HCl\left(1\right)}=2n_{H2}=1,2mol\)
\(\in n_{HCl}=0,6+1,2=1,8mol\)
m\(_{HCl}=1,8.36,5=65,7\left(g\right)\)
m\(_{HCl\left(36\%\right)}=\frac{65,7.36\%}{100\%}=20,4\left(g\right)\)
V\(_{HCl}=20,4,1,18=24ml\)
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