\(n_{HCl}=\dfrac{292.15\%}{36,5}=1,2\left(mol\right)\)
\(n_{Al_2O_3}=\dfrac{24,48}{102}=0,24\left(mol\right)\)
PTHH: Al2O3 + 6HCl --> 2AlCl3 + 3H2O
Xét tỉ lệ: \(\dfrac{0,24}{1}>\dfrac{1,2}{6}\) => Al2O3 dư, HCl hết
PTHH: Al2O3 + 6HCl --> 2AlCl3 + 3H2O
0,2<--1,2
=> \(\left\{{}\begin{matrix}m_{Cu}=0,35.64=22,4\left(g\right)\\m_{Al_2O_3}=\left(0,24-0,2\right).102=4,08\left(g\right)\end{matrix}\right.\)
=> mrắn = 22,4 + 4,08 = 26,48 (g)