Các phản ứng xảy ra:

a)

\(4F{\text{e}}{S_2} + 11{{\text{O}}_2}\xrightarrow{{{t^o}}}2F{{\text{e}}_2}{O_3} + 8S{O_2}\)

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

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

\(Ca{(OH)_2} + {H_2}S{O_4}\xrightarrow{{}}CaS{O_4} + 2{H_2}O\)

b)

\(2Ca + {O_2}\xrightarrow{{{t^o}}}2CaO\)

\(CaO + {H_2}O\xrightarrow{{}}Ca{(OH)_2}\)

\(Ca{(OH)_2} + 2HCl\xrightarrow{{}}CaC{l_2} + 2{H_2}O\)

\(CaC{l_2} + N{a_2}C{O_3}\xrightarrow{{}}CaC{{\text{O}}_3} + 2NaCl\)

c)

\(2NaOH + C{O_2}\xrightarrow{{}}N{a_2}C{O_3} + {H_2}O\)

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

\(2NaCl + 2{H_2}O\xrightarrow{{đpdd/cmn}}2NaOH + C{l_2} + {H_2}\)

\(NaOH + C{O_2}\xrightarrow{{}}NaHC{O_3}\)

Đáp án + Giải thích các bước giải:

Chuỗi $1$

 $4FeS_2$ + $11O_2$ $\xrightarrow[]{t^o}$ $2Fe_2O_3$ + $8SO_2$

$2SO_2$ + $O_2$ $\xrightarrow[]{t^o}$ $2SO_3$

$SO_3$ +$H_2O$ → $H_2SO_4$

$CaO$ + $H_2SO_4$ → $CaSO_4$ + $H_2O$

Chuỗi $2$

$2Ca$ + $O_2$ $\xrightarrow[]{t^o}$ $2CaO$

$CaO$ + $H_2O$ → $Ca(OH)_2$

$Ca(OH)_2$ + $2HCl$ → $CaCl_2$ + $2H_2O$

$CaCl_2$ + $Na_2CO_3$ → $CaCO_3$ $↓$ + $2NaCl$

Chuỗi $3$

$CO_2$ + $2NaOH$ → $Na_2CO_3$ + $H_2O$

$CaCl_2$ + $Na_2CO_3$ → $CaCO_3$ $↓$ + $2NaCl$

$2NaCl$ + $2H_2O$ $\xrightarrow[đp]{cmn}$ $2NaOH$ + $H_2$ + $Cl_2$

$NaOH$ + $CO_2$ → $NaHCO_3$