CACO3 (2) CO2 (3) ↓↑ (4) (10) (7)↓↑(6) (9) (8) (9) (8)
1.
CaCO
3
(2)
CO
2
(3)
↓↑(4) (10) (7)
↓↑(6)
(9)
(8)
Ca(HCO
3
)
2
→ Na
2
CO
3
1đ
(5)
Pthh:
(1)
CaCO
3
⃗t
0
CaO + CO
2
(2)
CO
2
+ Ca(OH)
2
→ CaCO
3
↓ + H
2
O
(3)
CaCO
3
+ CO
2
+ H
2
O→ Ca(HCO
3
)
2
(4) Ca(HCO
3
)
2
+ Ca(OH)
2
→CaCO
3
+ H
2
O
(5)
Ca(HCO
3
)
2
+ 2NaOH → CaCO
3
↓ + Na
2
CO
3
+ 2H
2
O
(6)
Na
2
CO
3
+ 2HCl → 2NaCl + CO
2
+ H
2
O
(7)
CO
2
+ 2NaOH→ Na
2
CO
3
↓ + H
2
O
(8)
Na
2
CO
3
+ CaCl
2
→ CaCO
3
↓ + 2NaCl
(9)
2CO
2
+ Ca(OH)
2
→ Ca(HCO
3
)
2
↓
(10)
Ca(HCO
3
)
2
+ 2HCl → CaCl
2
+ CO
2
+ H
2
O
n
H
2đ
Câu II
2
=0,2mol