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Bài 19: Sắt
\((1)F{e_2}{O_3} + 6HCl \to 2FeC{l_3} + 3{H_2}O\)
\((2)F{e_2}{O_3} + 3{H_2}\buildrel {{t^o}} \over\longrightarrow 2Fe + 3{H_2}O\)
\((3)2Fe + 3C{l_2}\buildrel {{t^o}} \over\longrightarrow 2FeC{l_3}\)
\((4)Fe + 2HCl \to FeC{l_2} + {H_2} \uparrow \)
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