Viết phương trình hóa học của phản ứng thực hiện dãy biến hóa: \(NaCl\,\, \to \,\,HCl\,\, \to \,\,C{l_2}\,\, \to \,\,KCl{O_3}\) \( \to \,\,KCl\,\, \to \,\,C{l_2}\,\, \to \,\,CaOC{l_2}\) Giải \(\eqalign{ & 2NaCl\left( r \right) + {H_2}S{O_4}\left( d \right)\,\,\buildrel {{t^0}} \over \longrightarrow \,\,N{a_2}S{O_4} + 2HCl \cr & 4HCl + Mn{O_2}\,\, \to \,\,C{l_2} + MnC{l_2} + 2{H_2}O \cr & 3C{l_2} + 6KOH\,\,\buildrel {{t^0}} \over \longrightarrow KCl{O_3} + 5KCl + 3{H_2}O \cr & 2KCl{O_3}\,\,\buildrel {{t^0}} \over \longrightarrow \,\,2KCl + 3{O_2} \cr & 2KCl + 2{H_2}\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{co\,mang\,ngan}^{dien\,phan}} \,\,{H_2} \uparrow + C{l_2} \uparrow + 2KOH \cr & C{l_2} + Ca{\left( {OH} \right)_2}\,\, \to \,\,CaOC{l_2} + {H_2}O \cr} \)
