Question
Wed June 04, 2008 By: Rishav Kumar

Carbon

Expert Reply
Wed June 18, 2008

It is most conveniently prepared in the lab. by the action of an acid on a carbonate. The apparatus used is shown below. The chemicals used are usually limestone or marble chips and dilute hydrochloric acid.

CALCIUM             +   HYDROCHLORIC           CALCIUM   +    WATER    +    CARBON
CARBONATE              ACID                                            CHLORIDE                                DIOXIDE
  (MARBLE)

CaCO3        +        2HCl                   CaCl2    +    H2O     +    CO2

             Diagram for lab preparation of carbon dioxide

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