\(a,\) Sửa đề Al hóa trị III
CT chung: \(Al_x^{III}\left(NO_3\right)_y^I\)
\(\Rightarrow x\cdot III=y\cdot I\Rightarrow\dfrac{x}{y}=\dfrac{1}{3}\Rightarrow x=1;y=3\\ \Rightarrow Al\left(NO_3\right)_3\)
\(b,\) CT chung \(Fe_x^{III}\left(SO_4\right)_y^{II}\)
\(\Rightarrow x\cdot III=y\cdot II\Rightarrow\dfrac{x}{y}=\dfrac{2}{3}\Rightarrow x=2;y=3\\ \Rightarrow Fe_2\left(SO_4\right)_3\)
a/ ta có CTHH: \(Al_x^{III}\left(NO_3\right)_y^I\) (bạn lưu ý là Al hóa trị III nhé)
\(\rightarrow III.x=I.y\rightarrow\dfrac{x}{y}=\dfrac{I}{III}=\dfrac{1}{3}\rightarrow\left\{{}\begin{matrix}x=1\\y=3\end{matrix}\right.\)
\(\rightarrow CTHH:Al\left(NO_3\right)_3\)
b/ ta có CTHH: \(Fe^{III}_x\left(SO_4\right)_y^{II}\)
\(\rightarrow III.x=II.y\rightarrow\dfrac{x}{y}=\dfrac{II}{III}=\dfrac{2}{3}\rightarrow\left\{{}\begin{matrix}x=2\\y=3\end{matrix}\right.\)
\(\rightarrow Fe_2\left(SO_4\right)_3\)