\(\left\{{}\begin{matrix}Al2O3;CuO;FeS\\K2SO4\end{matrix}\right.\underrightarrow{+H2O}\left\{{}\begin{matrix}dd:K2SO4\underrightarrow{to}K2SO4_{4\left(r\right)}\\Al2O3;CuO;FeS\underrightarrow{+NaOH}\left\{{}\begin{matrix}NaAlO2\underrightarrow{CO_2}Al\left(OH\right)3\underrightarrow{to}Al2O3\\CuO;FeS\underrightarrow{O_2}Fe2O3+CuO\end{matrix}\right.\end{matrix}\right.\)
Sửa :\(H2SO4\rightarrow K2SO4\)