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Câu hỏi: Dãy gồm các chất vừa tan trong dung dịch HCl, vừa tan trong dung dịch NaOH là:
A. NaHCO3, MgO, Ca(HCO3)2
B. NaHCO3, ZnO, Mg(OH)2
C. NaHCO3, Ca(HCO3)2, Al2O3.
D. Mg(OH)2, Al2O3, Ca(HCO3)2.
A. NaHCO3, MgO, Ca(HCO3)2
B. NaHCO3, ZnO, Mg(OH)2
C. NaHCO3, Ca(HCO3)2, Al2O3.
D. Mg(OH)2, Al2O3, Ca(HCO3)2.
$NaHC{{O}_{3}}+HCl\xrightarrow{{}}NaCl+C{{O}_{2}}+{{H}_{2}}O$ $NaHC{{O}_{3}}+NaOH\xrightarrow{{}}N{{a}_{2}}C{{O}_{3}}+{{H}_{2}}O.$
$Ca{{\left( HC{{O}_{3}} \right)}_{2}}+2HCl\xrightarrow{{}}CaC{{l}_{2}}+2C{{O}_{2}}+2{{H}_{2}}O$ $Ca{{\left( HC{{O}_{3}} \right)}_{2}}+NaOH\xrightarrow{{}}CaC{{O}_{3}}+NaHC{{O}_{3}}+{{H}_{2}}O$
Hoặc $Ca{{\left( HC{{O}_{3}} \right)}_{2}}+2NaOH\xrightarrow{{}}CaC{{\text{O}}_{3}}+N{{a}_{2}}C{{O}_{3}}+2{{H}_{2}}O$
$A{{l}_{2}}{{O}_{3}}+6HCl\xrightarrow{{}}2\text{A}lC{{l}_{3}}+3{{H}_{2}}O$ $A{{l}_{2}}{{O}_{3}}+2NaOH\xrightarrow{{}}2NaAl{{O}_{2}}+{{H}_{2}}O.$
$Ca{{\left( HC{{O}_{3}} \right)}_{2}}+2HCl\xrightarrow{{}}CaC{{l}_{2}}+2C{{O}_{2}}+2{{H}_{2}}O$ $Ca{{\left( HC{{O}_{3}} \right)}_{2}}+NaOH\xrightarrow{{}}CaC{{O}_{3}}+NaHC{{O}_{3}}+{{H}_{2}}O$
Hoặc $Ca{{\left( HC{{O}_{3}} \right)}_{2}}+2NaOH\xrightarrow{{}}CaC{{\text{O}}_{3}}+N{{a}_{2}}C{{O}_{3}}+2{{H}_{2}}O$
$A{{l}_{2}}{{O}_{3}}+6HCl\xrightarrow{{}}2\text{A}lC{{l}_{3}}+3{{H}_{2}}O$ $A{{l}_{2}}{{O}_{3}}+2NaOH\xrightarrow{{}}2NaAl{{O}_{2}}+{{H}_{2}}O.$
Đáp án C.