\[\eqalign{ & [1]\,\,Cu\,\, + \,C{l_2}\,\xrightarrow{{{t^o}}}\,CuC{l_2} \cr & [2]\,\,CuC{l_2}\,\, + \,\,\,2KOH\,\,\, \to \,\,Cu{[OH]_2} \downarrow \,\, + \,\,2KCl \cr & [3]\,\,\,Cu{[OH]_2}\,\,\, + \,\,\,{H_2}S{O_4}\,\, \to \,\,CuS{O_4}\,\, + \,\,2{H_2}O \cr & [4]\,\,\,CuS{O_4}\,\, + \,\,Zn\,\,\, \to \,\,\,ZnS{O_4}\,\,\, + \,\,Cu \cr & [5]\,\,Cu\,\, + \,\,S\,\,\xrightarrow{{{t^o}}}\,\,CuS \cr} \]
Đề bài
Viết các phương trình hoá học thực hiện chuỗi biến hoá sau:
\[Cu\buildrel {[1]} \over
\longrightarrow CuC{l_2}\buildrel {[2]} \over
\longrightarrow Cu{[OH]_2}\buildrel {[3]} \over
\longrightarrow CuS{O_4}\buildrel {[4]} \over
\longrightarrow Cu\buildrel {[5]} \over
\longrightarrow CuS\]
Lời giải chi tiết
\[\eqalign{
& [1]\,\,Cu\,\, + \,C{l_2}\,\xrightarrow{{{t^o}}}\,CuC{l_2} \cr
& [2]\,\,CuC{l_2}\,\, + \,\,\,2KOH\,\,\, \to \,\,Cu{[OH]_2} \downarrow \,\, + \,\,2KCl \cr
& [3]\,\,\,Cu{[OH]_2}\,\,\, + \,\,\,{H_2}S{O_4}\,\, \to \,\,CuS{O_4}\,\, + \,\,2{H_2}O \cr
& [4]\,\,\,CuS{O_4}\,\, + \,\,Zn\,\,\, \to \,\,\,ZnS{O_4}\,\,\, + \,\,Cu \cr
& [5]\,\,Cu\,\, + \,\,S\,\,\xrightarrow{{{t^o}}}\,\,CuS \cr} \]