Phương trình hoá học nào sau đây không đúng?
A. $\displaystyle \text{2NaHC}{{\text{O}}_{\text{3}}}\text{ }\!\!~\!\!\text{ + 2KOH }\!\!~\!\!\text{ }\!\!~\!\!\text{ }\to \text{ }\!\!~\!\!\text{ N}{{\text{a}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3}}}\text{ }\!\!~\!\!\text{ + }{{\text{K}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3}}}\text{ }\!\!~\!\!\text{ + 2}{{\text{H}}_{\text{2}}}\text{O}\text{.}~$
B. $\displaystyle \text{Ca}{{\left( \text{HC}{{\text{O}}_{\text{3}}} \right)}_{\text{2}}}\text{ }\!\!~\!\!\text{ + N}{{\text{a}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3}}}\text{ }\!\!~\!\!\text{ }\!\!~\!\!\text{ }\to ~\text{ }\!\!~\!\!\text{ CaC}{{\text{O}}_{\text{3}}}\downarrow ~\text{+ 2NaHC}{{\text{O}}_{\text{3}}}\text{.}$
C. $\displaystyle \text{2NaCl + 2}{{\text{H}}_{\text{2}}}\text{O }\xrightarrow{\text{dpdd}\,\,\text{cmn}}\text{ }\!\!~\!\!\text{ }\!\!~\!\!\text{ 2NaOH + }{{\text{H}}_{\text{2}}}\text{ }\!\!~\!\!\text{ + C}{{\text{l}}_{\text{2}}}\text{.}$
D. $\displaystyle \text{2KN}{{\text{O}}_{\text{3 }\!\!~\!\!\text{ }}}\text{ }\!\!~\!\!\text{ }\!\!~\!\!\text{ }\xrightarrow{{{\text{t}}^{\text{o}}}}\text{ 2K + 2N}{{\text{O}}_{\text{2}}}\text{ }\!\!~\!\!\text{ + }{{\text{O}}_{\text{2}}}\text{.}$
A. $\displaystyle \text{2NaHC}{{\text{O}}_{\text{3}}}\text{ }\!\!~\!\!\text{ + 2KOH }\!\!~\!\!\text{ }\!\!~\!\!\text{ }\to \text{ }\!\!~\!\!\text{ N}{{\text{a}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3}}}\text{ }\!\!~\!\!\text{ + }{{\text{K}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3}}}\text{ }\!\!~\!\!\text{ + 2}{{\text{H}}_{\text{2}}}\text{O}\text{.}~$
B. $\displaystyle \text{Ca}{{\left( \text{HC}{{\text{O}}_{\text{3}}} \right)}_{\text{2}}}\text{ }\!\!~\!\!\text{ + N}{{\text{a}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3}}}\text{ }\!\!~\!\!\text{ }\!\!~\!\!\text{ }\to ~\text{ }\!\!~\!\!\text{ CaC}{{\text{O}}_{\text{3}}}\downarrow ~\text{+ 2NaHC}{{\text{O}}_{\text{3}}}\text{.}$
C. $\displaystyle \text{2NaCl + 2}{{\text{H}}_{\text{2}}}\text{O }\xrightarrow{\text{dpdd}\,\,\text{cmn}}\text{ }\!\!~\!\!\text{ }\!\!~\!\!\text{ 2NaOH + }{{\text{H}}_{\text{2}}}\text{ }\!\!~\!\!\text{ + C}{{\text{l}}_{\text{2}}}\text{.}$
D. $\displaystyle \text{2KN}{{\text{O}}_{\text{3 }\!\!~\!\!\text{ }}}\text{ }\!\!~\!\!\text{ }\!\!~\!\!\text{ }\xrightarrow{{{\text{t}}^{\text{o}}}}\text{ 2K + 2N}{{\text{O}}_{\text{2}}}\text{ }\!\!~\!\!\text{ + }{{\text{O}}_{\text{2}}}\text{.}$
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Hóa Học lớp 12
