Question

How could you show that the gas jar contains carbon dioxide?

Answer 1

Answer:

Pass the gas to lime water. The lime water turn milky indicating that the gas is carbon dioxide.

Explanation:

Carbon dioxide reacts with limewater (a solution of calcium hydroxide, Ca(OH) 2), to form a white precipitate (appears milky) of calcium carbonate, CaCO 3. Adding more carbon dioxide results in the precipitate dissolving to form a colourless solution of calcium hydrogencarbonate.