Câu hỏi: Từ hai muối X và Y thực hiện các phản ứng sau:
(1) X $\to $ X1 + CO2 (2) X1 + H2O $\to $ X2
(3) X2 + Y $\to $ X + Y1 + H2O (4) X2 + 2Y $\to $ X + Y2 + H2O
Muối X, Y tương ứng là
A. MgCO3, NaHCO3.
B. CaCO3, NaHCO3.
C. CaCO3, NaHSO4.
D. BaCO3, Na2CO3.
(1) X $\to $ X1 + CO2 (2) X1 + H2O $\to $ X2
(3) X2 + Y $\to $ X + Y1 + H2O (4) X2 + 2Y $\to $ X + Y2 + H2O
Muối X, Y tương ứng là
A. MgCO3, NaHCO3.
B. CaCO3, NaHCO3.
C. CaCO3, NaHSO4.
D. BaCO3, Na2CO3.
$\begin{aligned}
& \underbrace{CaC{{O}_{3}}}_{X}\xrightarrow{{{t}^{o}}}\underbrace{CaO}_{{{X}_{1}}}+C{{O}_{2}}\uparrow \\
& \underbrace{CaO}_{{{X}_{1}}}+{{H}_{2}}O\to \underbrace{Ca{{(OH)}_{2}}}_{{{X}_{2}}} \\
& \underbrace{Ca{{(OH)}_{2}}}_{{{X}_{2}}}+\underbrace{NaHC{{O}_{3}}}_{Y}\to \underbrace{CaC{{O}_{3}}}_{X}+\underbrace{NaOH}_{{{Y}_{1}}}+{{H}_{2}}O \\
& \underbrace{Ca{{(OH)}_{2}}}_{{{X}_{2}}}+2\underbrace{NaHC{{O}_{3}}}_{Y}\to \underbrace{CaC{{O}_{3}}}_{X}+\underbrace{N{{a}_{2}}C{{O}_{3}}}_{{{Y}_{2}}}+2{{H}_{2}}O \\
\end{aligned}$
& \underbrace{CaC{{O}_{3}}}_{X}\xrightarrow{{{t}^{o}}}\underbrace{CaO}_{{{X}_{1}}}+C{{O}_{2}}\uparrow \\
& \underbrace{CaO}_{{{X}_{1}}}+{{H}_{2}}O\to \underbrace{Ca{{(OH)}_{2}}}_{{{X}_{2}}} \\
& \underbrace{Ca{{(OH)}_{2}}}_{{{X}_{2}}}+\underbrace{NaHC{{O}_{3}}}_{Y}\to \underbrace{CaC{{O}_{3}}}_{X}+\underbrace{NaOH}_{{{Y}_{1}}}+{{H}_{2}}O \\
& \underbrace{Ca{{(OH)}_{2}}}_{{{X}_{2}}}+2\underbrace{NaHC{{O}_{3}}}_{Y}\to \underbrace{CaC{{O}_{3}}}_{X}+\underbrace{N{{a}_{2}}C{{O}_{3}}}_{{{Y}_{2}}}+2{{H}_{2}}O \\
\end{aligned}$
Đáp án B.