Question

Using a magnesium ribbon, how would you prove that a given gas jar contains carbon dioxide.

Answer 1

It is a test to find gas in the jar is carbon dioxide. On burning magnesium ribbon in a jar of carbon dioxide.

Mg burns in CO₂ gas depositing – black particles of carbon on the walls of the jar. If black particles are found on the walls of jar, it is carbon dioxide gas.

CO₂ + 2Mg → 2MgO + C