Đáp án:
Giải thích các bước giải:
$\begin{array}{*{20}{c}} {N{a_2}C{O_3}}&{}&{\xrightarrow{{}}}&{}&{NaOH} \\ {}& \nwarrow &{}& \nearrow &{} \\ \downarrow &{}&{N{a_2}O}&{}&{ \uparrow \downarrow } \\ {}& \swarrow &{}& \searrow &{} \\ {N{a_2}S{O_4}}&{}&{\overset {} \leftrightarrows }&{}&{NaCl} \end{array}$
$\begin{gathered}
N{a_2}O + {H_2}O \to 2NaOH \hfill \\
N{a_2}O + C{O_2} \to N{a_2}C{O_3} \hfill \\
N{a_2}O + 2HCl \to NaCl + {H_2}O \hfill \\
N{a_2}O + {H_2}S{O_4} \to N{a_2}S{O_4} + {H_2}O \hfill \\
NaOH + HCl \to NaCl + {H_2}O \hfill \\
2NaCl + 2{H_2}O\xrightarrow[{cmn}]{{dpdd}}2NaOH + {H_2} + C{l_2} \hfill \\
N{a_2}C{O_3} + {H_2}S{O_4} \to N{a_2}S{O_4} + C{O_2} + {H_2}O \hfill \\
N{a_2}S{O_4} + BaC{l_2} \to 2NaCl + BaS{O_4} \downarrow \hfill \\
NaC{l_{(r)}} + {H_2}S{O_{4(d)}}\xrightarrow{{ > {{250}^o}C}}N{a_2}S{O_4} + HCl \uparrow \hfill \\
\end{gathered} $
$N{a_2}C{O_3} + Ca{(OH)_2} \to 2NaOH + CaC{O_3} \downarrow $
