nH2 = 6,12/22,4 = 0,27 (mol)
PTHH :
2Al + 6HCl ---> 2AlCl3 + 3H2
0,18...0,54............0,18.......0,27
mAl = 0,18 . 27 =4,86 (g)
%mAl = 4,86 . 100 / 10 =48,6%
=> % mCu = 100% - 48,6% = 51,4%
\(mddHCl=\frac{0,54\cdot36,5\cdot100}{14,6}=135\left(g\right)\)
mdd sau phản ứng = 4,86 + 135 - 6,12 =133,74 (g)
\(C\%=\frac{0,18\cdot133,05}{133,74}\cdot100=17,9\%\)