a, Theo gt ta có: [tex]m_{Al}=22.\frac{49,1}{100}=10,802(g)\Rightarrow n_{Al}=\frac{10,802}{27}\approx 0,4(mol)[/tex]
[tex]\Rightarrow m_{Fe}=22-10,802=11,198(g)\Rightarrow n_{Fe}=\frac{11,198}{56}=\approx 0,2(mol)[/tex]
PTHH: [tex]2Al+6HCl\rightarrow 2AlCl_3+3H_2[/tex] (*)
Theo (*) và gt: 0,4mol......1,2mol.....0,4mol.......0,6mol
[tex]\Rightarrow m_{HCl/(*)}=1,2.36,5=43,8(g)[/tex]
[tex]V_{H_2}=0,6.22,4=13,44(l)[/tex]
[tex]Fe+2HCl\rightarrow FeCl_2+H_2[/tex] (**)
Theo (**) và gt ta có: 0,2mol.....0,4mol.....0,2mol.....0,2mol
[tex]\Rightarrow m_{HCl/(**)}=0,4.36,5=14,6(g)[/tex]
[tex]V_{H_2}=0,2.22,4=4,48(l)[/tex]
Do đó [tex]m_{HCl/candung}=43,8+16,4=58,4(g);V_{H_2/sinhra}=13,44+4,48=17,92(l)[/tex]
c, Theo gt ta có: [tex]\Rightarrow n_{H_2}=\frac{17,92}{22,4}=0,8(mol)[/tex]
[tex]n_{CuO}=\frac{72}{80}=0,9(mol)[/tex]
PTHH: [tex]CuO+H_2\rightarrow Cu+H_2O[/tex] (***)
Lập tỉ lệ: [tex]\frac{0,8}{1}<\frac{0,9}{1}[/tex]
Do đó $CuO$ dư
Theo (***) và gt ta có: 0,8mol....0,8mol.....0,8mol....0,8mol
[tex]\Rightarrow m_{Cu}=0,8.64=51,2(g)[/tex]
[tex]m_{CuO/du}=0,1.80=8(g)[/tex]
Do đó [tex]m_{ran}=51,2+8=59,2(g)[/tex]