Hoàn thành các chuỗi phản ứng sau a KMnO4~Cl2~Br2~H2SO4~SO2~S~H2S~SO2~NaHSO3~Na2SO3~SO2 b FeS2~SO2~SO3~H2SO4~CuSO4~BaSO4 c KMno4~O2~SO2~H2SO4~HCl~NaC

a)

\(2KMn{O_4} + 16HCl\xrightarrow{{}}2KCl + 2MnC{l_2} + 5C{l_2} + 8{H_2}O\)

\(C{l_2} + 2KBr\xrightarrow{{}}2KCl + B{r_2}\)

\(S{O_2} + B{r_2} + 2{H_2}O\xrightarrow{{}}{H_2}S{O_4} + 2HBr\)

\(Cu + 2{H_2}S{O_4}\xrightarrow{{{t^o}}}CuS{O_4} + S{O_2} + 2{H_2}O\)

\(2{H_2}S + S{O_2}\xrightarrow{{{t^o}}}3S + 2{H_2}O\)

\(2{H_2}S + 3{O_2}\xrightarrow{{{t^o}}}2S{O_2} + 2{H_2}O\)

\(NaOH + S{O_2}\xrightarrow{{}}NaHS{O_3}\)

\(NaOH + NaHS{O_3}\xrightarrow{{}}N{a_2}S{O_3} + {H_2}O\)

\(N{a_2}S{O_3} + 2HCl\xrightarrow{{}}2NaCl + S{O_2} + {H_2}O\)

b)

\(4Fe{S_2} + 11{O_2}\xrightarrow{{{t^o}}}2F{e_2}{O_3} + 8S{O_2}\)

\(2S{O_2} + {O_2}\xrightarrow{{{V_2}{O_5},{t^o}}}2S{O_3}\)

\({H_2}O + S{O_3}\xrightarrow{{}}{H_2}S{O_4}\)

\(CuO + {H_2}S{O_4}\xrightarrow{{}}CuS{O_4} + {H_2}O\)

\(CuS{O_4} + Ba{(OH)_2}\xrightarrow{{}}BaS{O_4} + Cu{(OH)_2}\)

c)

\(2KMn{O_4}\xrightarrow{{{t^o}}}{K_2}Mn{O_4} + Mn{O_2} + {O_2}\)

\(S + {O_2}\xrightarrow{{{t^o}}}S{O_2}\)

\(S{O_2} + B{r_2} + 2{H_2}O\xrightarrow{{}}{H_2}S{O_4} + 2HBr\)

\(NaC{l_r} + {H_2}S{O_4}\xrightarrow{{{t^o}}}NaHS{O_4} + HCl\)

\(NaOH + HCl\xrightarrow{{}}NaCl + {H_2}O\)

\(NaCl + AgN{O_3}\xrightarrow{{}}AgCl + NaN{O_3}\)