Đề bài
Viết các phương trình hoá học biểu diễn sự chuyển đổi sau:
Lời giải chi tiết
a. Các phương trình hóa học
\[\eqalign{
& [1]\,Fe\, + \,2HCl\,\, \to \,FeC{l_2}\, + \,{H_2} \uparrow \cr
& [2]\,\,FeC{l_2}\, + \,2KOH\, \to \,Fe{[OH]_2}\, + \,2KCl \cr
& [3]\,Fe{[OH]_2}\, + \,{H_2}S{O_4}\text{[loãng]}\, \to \,FeS{O_4}\, + \,2{H_2}O \cr
& [4]\,FeS{O_4}\, + \,Ba{[N{O_3}]_2}\, \to \,BaS{O_4} \downarrow \, + \,Fe{[N{O_3}]_2} \cr
& [5]\,Fe{[N{O_3}]_2}\, + \,Zn\,\, \to \,\,Zn{[N{O_3}]_2}\,\, + \,\,Fe \cr
& [6]\,2Fe\, + \,\,3C{l_2}\,\xrightarrow{{{t^o}}}\,\,2FeC{l_3} \cr
& [7]\,\,FeC{l_3}\,\, + \,\,3NaOH\,\, \to \,\,Fe{[OH]_3} \downarrow \, + \,3NaCl \cr
& [8]\,2Fe{[OH]_3}\,\xrightarrow{{{t^o}}}\,\,F{e_2}{O_3}\,\, + \,\,3{H_2}O \cr
& [9]\,\,F{e_2}{O_3}\,\, + \,\,3CO\,\xrightarrow{{{t^o}}}\,2Fe\, + \,\,3C{O_2} \cr
& [10]\,\,\,3Fe\,\, + \,\,2{O_2}\,\xrightarrow{{{t^o}}}\,\,F{e_3}{O_4}\, \cr} \]
b. Các phương trình hóa học
\[\eqalign{
& 4Al\, + \,3{O_2}\,\xrightarrow{{{t^o}}}\,\,\,2A{l_2}{O_3} \cr
& 4A{l_2}{O_3}\,\, + \,\,6HN{O_3}\,\, \to \,\,2Al{[N{O_3}]_3}\,\, + \,\,2{H_2}O \cr
& Al{[N{O_3}]_3}\,\, + \,\,3KOH\,\, \to \,\,Al{[OH]_3} \downarrow \,\, + \,\,3KN{O_3} \cr
& 2Al{[OH]_3}\,\, + \,\,3{H_2}S{O_4}\,\, \to \,\,A{l_2}{[S{O_4}]_3}\,\, + \,6{H_2}O \cr
& A{l_2}{[S{O_4}]_3}\,\, + \,\,3BaC{l_2}\,\, \to \,\,3BaS{O_4}\,\, + \,\,2AlC{l_3} \cr} \]