Câu hỏi của Hạ Du

Question

Hoàn thành sơ đồ chuyển hóa sau :

Ca - > CaO - > Ca(OH)2 - > CaCO3 - > Ca(HCO3)2 - > CaCl2 - > CaCO3

thuongnguyen · Accepted Answer

(1) 2Ca + O2 -t0-> 2CaO

(2) CaO + H2O - > Ca(OH)2

(3) $Ca\left(OH\right)2+CO2->CaCO3\downarrow+H2O$

(4) $CaCO3+CO2+H2O->Ca\left(HCO3\right)2$

(5) $Ca\left(HCO3\right)2+2HCl->CaCl2+2Co2\uparrow+2H2O$

(6) $CaCl2+Na2CO3->CaCO3\downarrow+2NaCl$Câu trả lời: (1) 2Ca + O2 -t0-> 2CaO

(2) CaO + H2O - > Ca(OH)2

(3) $Ca\left(OH\right)2+CO2->CaCO3\downarrow+H2O$

(4) $CaCO3+CO2+H2O->Ca\left(HCO3\right)2$

(5) $Ca\left(HCO3\right)2+2HCl->CaCl2+2Co2\uparrow+2H2O$

(6) $CaCl2+Na2CO3->CaCO3\downarrow+2NaCl$

Hoàng Thảo Linh · Answer

1) 2Ca + O2 $\rightarrow$ 2CaO

2) CaO + H2O $\rightarrow$Ca(OH)2

3) Ca(OH)2 + CO2 $\rightarrow$ CaCO3 + H2O

4) CaCO3 + CO2 + H2O $\rightarrow$ Ca(HCO3)2

5) Ca(HCO3)2 + 2HCl $\rightarrow$ CaCl2 + 2CO2 + 2H2O

6)CaCl2 + K2CO3 $\rightarrow$ CaCO3 + KClCâu trả lời: 1) 2Ca + O2 $\rightarrow$ 2CaO

2) CaO + H2O $\rightarrow$Ca(OH)2

3) Ca(OH)2 + CO2 $\rightarrow$ CaCO3 + H2O

4) CaCO3 + CO2 + H2O $\rightarrow$ Ca(HCO3)2

5) Ca(HCO3)2 + 2HCl $\rightarrow$ CaCl2 + 2CO2 + 2H2O

6)CaCl2 + K2CO3 $\rightarrow$ CaCO3 + KCl