a) CaCO3 => CO2 => CaCO3 => Ca(HCO3)2 => CO2 b) CaCO3 => CaO => Ca(OH)2 => NaOH => NaHCO3 => Na2CO3
2 câu trả lời
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$\text{a) CaCO3$\xrightarrow{1}$CO2$\xrightarrow{2}$CaCO3$\xrightarrow{3}$Ca(HCO3)2$\xrightarrow{4}$CO2}$
$\rightarrow$ $\text{1) CaCO3$\xrightarrow{t^o}$CaO+CO2}$
$\rightarrow$ $\text{2) CO2+Ca(OH)2$\rightarrow$CaCO3+H2O}$
$\rightarrow$ $\text{3) CaCO3+CO2+H2O$\rightleftharpoons$Ca(HCO3)2}$
$\rightarrow$ $\text{4) Ca(HCO3)2$\rightleftharpoons$CO2+H2O+CaCO3}$
$\text{b) CaCO3$\xrightarrow{1}$CaO$\xrightarrow{2}$Ca(OH)2$\xrightarrow{3}$NaOH$\xrightarrow{4}$NaHCO3$\xrightarrow{5}$Na2CO3}$
$\rightarrow$ $\text{1) CaCO3$\xrightarrow{t^o}$CaO+CO2}$
$\rightarrow$ $\text{2) CaO+H2O$\rightarrow$Ca(OH)2}$
$\rightarrow$ $\text{3) Ca(OH)2+Na2CO3$\rightarrow$2NaOH+CaCO3↓}$
$\rightarrow$ $\text{4) NaOH+CO2$\rightarrow$NaHCO3}$
$\rightarrow$ $\text{5) NaHCO3+NaOH$\rightarrow$Na2CO3+H2O}$
#TRANPHAMGIABAO