ko bik a chị cs thấy ảnh ko,a chị trl giúp e
\(a,\left(1\right)2Fe\left(OH\right)_3\underrightarrow{^{to}}Fe_2O_3+3H_2O\\ \left(2\right)Fe_2O_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+3H_2O\\ \left(3\right)Fe_2\left(SO_4\right)_3+3BaCl_2\rightarrow3BaSO_4\downarrow+2FeCl_3\\ \left(4\right)FeCl_3+3KOH\rightarrow Fe\left(OH\right)_3+3KCl\)
\(b,\left(1\right)CaCO_3\underrightarrow{^{to}}CaO+CO_2\\ \left(2\right)CaO+2HCl\rightarrow CaCl_2+H_2O\\ \left(3\right)CaCl_2+2AgNO_3\rightarrow2AgCl\downarrow+Ca\left(NO_3\right)_2\\ \left(4\right)Ca\left(NO_3\right)_2+Na_2CO_3\rightarrow CaCO_3\downarrow+2NaNO_3\\ \left(5\right)CaCO_3+2HNO_3\rightarrow Ca\left(NO_3\right)_2+CO_2+H_2O\)
\(c,\left(1\right)FeO+2HCl\rightarrow FeCl_2+H_2O\\ \left(2\right)FeCl_2+Zn\rightarrow ZnCl_2+Fe\\ \left(3\right)2Fe+3Cl_2\underrightarrow{^{to}}2FeCl_3\\ \left(4\right)FeCl_3+3KOH\rightarrow Fe\left(OH\right)_3+3KCl\\ \left(5\right)2Fe\left(OH\right)_3\underrightarrow{^{to}}Fe_2O_3+3H_2O\)
