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

Dạng 1. Khử hỗn hợp oxit kim loại bằng CO, H2