a)
\(2Na + C{l_2}\xrightarrow{{{t^o}}}2NaCl\)
\(2NaCl\xrightarrow{{đpnc}}2Na + C{l_2}\)
\({H_2} + C{l_2}\xrightarrow{{{t^o}}}2HCl\)
\(Mn{O_2} + 4HCl\xrightarrow{{}}MnC{l_2} + C{l_2} + 2{H_2}O\)
\(2NaOH + C{l_2}\overset {} \leftrightarrows NaCl + NaClO + {H_2}O\)
b)
\(Ca{(OH)_2} + C{l_2}\xrightarrow{{}}CaOC{l_2} + {H_2}O\)
\(CaOC{l_2} + C{O_2}\xrightarrow{{}}CaC{{\text{O}}_3} + C{l_2}\)
\(CaC{{\text{O}}_3}\xrightarrow{{{t^o}}}CaO + C{O_2}\)
c)
\(NaOH + HCl\xrightarrow{{}}NaCl + {H_2}O\)
\(NaC{l_r} + {H_2}S{O_4}\xrightarrow{{{t^o}}}NaH{\text{S}}{O_4} + HCl\)
\(F{\text{e + 2HCl}}\xrightarrow{{}}F{\text{e}}C{l_2} + {H_2}\)
\(F{\text{e + 2HCl}}\xrightarrow{{}}F{\text{e}}C{l_2} + {H_2}\)
d)
\(F{\text{e + 2HCl}}\xrightarrow{{}}F{\text{e}}C{l_2} + {H_2}\)
\(B{{\text{r}}_2} + 2NaI\xrightarrow{{}}2NaB{\text{r}} + {I_2}\)
\(2{\text{A}}l + 3{I_2}\xrightarrow{{{t^o}}}2{\text{A}}l{I_3}\)