A volcanic eruption can be demonstrated using vinegar and baking soda. Foam and bubble overflow simulates the eruption. How are the foam and bubble formed when baking soda solution is mixed with vinegar? Which substance can be used as an antacid?

• A. Water vapor is formed in the reaction and released as bubbles and foam.
  Vinegar can be used as an antacid.
• B. Carbon dioxide gas is formed in the reaction and released as bubbles and foam.
  Vinegar can be used as an antacid.
• C. Water vapor is formed in the reaction and released as bubbles and foam.
  Baking soda can be used as an antacid.
• D. Carbon dioxide gas is formed in the reaction and released as bubbles and foam.
  Baking soda can be used as an antacid.

Answer: (D)