0.5 CACO3  TO CAO + CO20.5 CAO + 2C  TO CAC2+ CO0.5 CAC2...

Câu 2.

0.5

CaCO

3

^t

^o

CaO + CO

2

CaO + 2C

^t

^o

CaC

2

+ CO

CaC

2

+ 2H

2

O  C

2

H

2

+ Ca(OH)

2

C

2

H

2

+ 2Br

2

 C

2

H

2

Br

4