CuO + 2HCl \(\rightarrow\)CuCl2 + H2O (1)
Al2O3 + 6HCl \(\rightarrow\)2AlCl3 + 3H2O (2)
Đặt nCuO=a
nAl2O3=b
Ta có:
\(\left\{{}\begin{matrix}80a+102b=60,4\\135a+133,5.2.b=120,9\end{matrix}\right.\)
=>a=0,5;b=0,2
mCuO=80.0,5=40(g)
mAl2O3=60,4-40=20,4(g)
b;\(\sum\)nHCl=0,5.2+0,2.6=2,2(mol)
mHCl=2,2.36,5=80,3(g)
mdd HCl=80,3:\(\dfrac{14,6}{100}=550\left(g\right)\)
mCuCl2=135.0,5=67,5(g)
mAlCl3=120,9-67,5=53,4(g)
C% dd CuCl2=\(\dfrac{67,5}{60,4+550}.100\%=11,06\%\)
C% dd AlCl3=\(\dfrac{53,4}{60,4+550}.100\%=8,7\%\)
e ấn nhầm là 20axit nhưng chích xác la 2 oxit ạ