Câu 1 :
\(2Fe\left(OH\right)_3\underrightarrow{^{^{t^o}}}Fe_2O_3+3H_2O\)
\(Fe_2O_3+3H_2\underrightarrow{^{^{t^o}}}2Fe+3H_2O\)
\(Fe+2HCl\rightarrow FeCl_2+H_2\)
\(FeCl_2+2NaOH\rightarrow Fe\left(OH\right)_2+2NaCl\)
Câu 6 :
a.
\(Al_2\left(SO_4\right)_3+6NaOH\rightarrow2Al\left(OH\right)_3+3Na_2SO_4\)
\(2Al\left(OH\right)_3\underrightarrow{^{^{t^o}}}Al_2O_3+3H_2O\)
b.
\(Fe_2\left(SO_4\right)_3+6NaOH\rightarrow2Fe\left(OH\right)_3+3Na_2SO_4\)
\(2Fe\left(OH\right)_3\underrightarrow{^{^{t^o}}}Fe_2O_3+3H_2O\)
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