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How to Obtain Carbon Dioxide

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How to Obtain Carbon Dioxide

Burning or Oxidation:
There are several ways in which carbon dioxide can be produced commercially, but for laboratory use the simplest is to mix in a test tube powdered marble, or chalk, and hydrochloric acid, and to collect the effervescing gas as shown in Figure. The substance which remains in the test tube after the gas has passed off is a solution of a salt and water. From a mixture of hydrochloric acid (HCl) and marble are obtained a salt, water, and carbon dioxide, the desired gas.


FIG. - Making carbon dioxide from marble and hydrochloric acid.


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