a) Fe2O3 + 6HCl -> 2FeCl3 + 3H2O
FeCl3 + 3NaOH -> Fe(OH)3 + 3NaCl
2Fe(OH)3 + 3H2SO4 -> Fe(SO4)3 + 6H2O
b) CuO + HCl -> CuCl2 + H2O
CuCl2 + 2NaOH->Cu(OH)2 + 2NaCl
Cu(OH)2 + H2SO4 -> CuSO4 +2H2O
a) \(Fe_2O_3\underrightarrow{\left(1\right)}FeCl_3\underrightarrow{\left(2\right)}Fe\left(OH\right)_3\underrightarrow{\left(3\right)}Fe\left(SO_{\text{4}}\right)_3\)
\(\left(1\right)2Fe_2O_3+6Cl_2\rightarrow4FeCl_3+3O_2\)
\(\left(2\right)FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_3+3NaCl\)
\(\left(3\right)PTHH:??\)
b) \(CuO\underrightarrow{\left(1\right)}CuCl_2\underrightarrow{\left(2\right)}Cu\left(OH\right)_2\underrightarrow{\left(3\right)}CuSO_4\)
\(\left(1\right)CuO+2HCl\rightarrow CuCl_2+H_2O\)
\(\left(2\right)CuCl_2+2NaOH\rightarrow Cu\left(OH\right)_2+2NaCl\)
\(\left(3\right)Cu\left(OH\right)_2+H_2SO_4\rightarrow CuSO_4+2H_2O\)