4. SO2 tác dụng với Oxi, NaOH, KOH, Ca(OH)2, nước Clo, Nước Brom
5. H2SO4 loãng tác dụng với Mg, Al, Zn, Fe, Cu, Ag, NaOH, Ba(OH)2, BaCl2, Na2CO3, FeS, K2S, Ca(NO3)2, Na2SO3, Cu(OH)2, Fe(OH)3, Al2O3, FeO
4. SO2 tác dụng với Oxi, NaOH, KOH, Ca(OH)2, nước Clo, Nước Brom
5. H2SO4 loãng tác dụng với Mg, Al, Zn, Fe, Cu, Ag, NaOH, Ba(OH)2, BaCl2, Na2CO3, FeS, K2S, Ca(NO3)2, Na2SO3, Cu(OH)2, Fe(OH)3, Al2O3, FeO
Giải thích các bước giải:
4, \(\begin{array}{l}
S{O_2} + \dfrac{1}{2}{O_2} \to S{O_3}\\
S{O_2} + 2NaOH \to N{a_2}S{O_3} + {H_2}O\\
S{O_2} + 2KOH \to {K_2}S{O_3} + {H_2}O\\
S{O_2} + Ca{\left( {OH} \right)_2} \to CaS{O_3} + {H_2}O\\
\begin{array}{*{20}{l}}
{C{l_2}}& + &{2{H_2}O}& + &{S{O_2}}& \to &{{H_2}S{O_4}}& + &{2HCl}
\end{array}\\
\begin{array}{*{20}{l}}
{B{r_2}}& + &{2{H_2}O}& + &{S{O_2}}& \to &{{H_2}S{O_4}}& + &{2HBr}
\end{array}
\end{array}\)
5, \(\begin{array}{l}
{H_2}S{O_4} + Mg \to MgS{O_4} + {H_2}\\
3{H_2}S{O_4} + 2Al \to A{l_2}{\left( {S{O_4}} \right)_3} + 3{H_2}\\
{H_2}S{O_4} + Zn \to ZnS{O_4} + {H_2}\\
{H_2}S{O_4} + Fe \to FeS{O_4} + {H_2}\\
{H_2}S{O_4} + 2NaOH \to N{a_2}S{O_4} + 2{H_2}O\\
{H_2}S{O_4} + Ba{\left( {OH} \right)_2} \to BaS{O_4} + 2{H_2}O\\
{H_2}S{O_4} + BaC{l_2} \to BaS{O_4} + 2HCl\\
{H_2}S{O_4} + N{a_2}C{O_3} \to N{a_2}S{O_4} + C{O_2} + {H_2}O\\
2FeS + 10{H_2}S{O_4} \to F{e_2}{\left( {S{O_4}} \right)_3} + 10{H_2}O + 9S{O_2}\\
\begin{array}{*{20}{l}}
{{H_2}S{O_4}}& + &{{K_2}S}& \to &{{H_2}S}& + &{{K_2}S{O_4}}
\end{array}\\
{H_2}S{O_4} + Ca{\left( {N{O_3}} \right)_2} \to CaS{O_4} + 2HN{O_3}\\
{H_2}S{O_4} + N{a_2}S{O_3} \to {H_2}O + N{a_2}S{O_4} + S{O_2}\\
\begin{array}{*{20}{l}}
{Cu{{\left( {OH} \right)}_2}}& + &{{H_2}S{O_4}}& \to &{2{H_2}O}& + &{CuS{O_4}}
\end{array}\\
2\begin{array}{*{20}{l}}
{Fe{{\left( {OH} \right)}_3}}& + &{3{H_2}S{O_4}}& \to &{6{H_2}O}& + &{F{e_2}{{\left( {S{O_4}} \right)}_3}}
\end{array}\\
{\begin{array}{*{20}{l}}
{3{H_2}S{O_4}}& + &{A{l_2}{O_3}}& \to &{3{H_2}O}& + &{A{l_2}\left( {S{O_4}} \right)}
\end{array}_3}\\
FeO + {H_2}S{O_4} \to FeS{O_4} + {H_2}O
\end{array}\)