Tiến hành các thí nghiệm sau:(a) Cho Mg vào dung d...

C

- Hướng dẫn giải

Phương pháp giải:

Giải chi tiết:

\(\begin{array}{*{20}{l}}
{\left( a \right){\text{ }}Mg{\text{ }} + {\text{ }}F{e_2}{{\left( {S{O_4}} \right)}_3}{\text{ }}du{\text{ }} \to {\text{ }}MgS{O_4}{\text{ }} + {\text{ }}2FeS{O_4}} \\
{\left( b \right){\text{ }}2FeC{l_2}{\text{ }} + {\text{ }}C{l_2}{\text{ }} \to {\text{ }}2FeC{l_3}} \\
{\left( c \right){\text{ }}{H_2}{\text{ }} + {\text{ }}CuO{\text{ }}\xrightarrow{{{t^o}}}{\text{ }}Cu{\text{ }} + {\text{ }}{H_2}O} \\
{\left( d \right){\text{ }}2Na{\text{ }} + {\text{ }}2{H_2}O{\text{ }} \to {\text{ }}2NaOH{\text{ }} + {\text{ }}{H_2}} \\
{\,\,\,\,\,\,\,\,\,CuS{O_4}{\text{ }} + {\text{ }}2NaOH{\text{ }} \to {\text{ }}Cu{{\left( {OH} \right)}_2}{\text{ }} + {\text{ }}N{a_2}S{O_4}} \\
{\left( e \right){\text{ }}4Fe{S_2}{\text{ }} + {\text{ }}11{O_2}{\text{ }} \to {\text{ }}2F{e_2}{O_3}{\text{ }} + {\text{ }}8S{O_2}} \\
{\left( g \right){\text{ 2}}NaCl + 2{H_2}O\xrightarrow{{dp{\text{mn}}}}2NaOH + {H_2} + C{l_2}}
\end{array}\)

Đáp án C