Marble is made from limestone under the influence of heat and pressure. The chemical formula for limestone or marble chips is [tex]\text{CaCO}_3[/tex]. When you added the chips to the acid solutions, they effervesced (bubbled or foamed).

1. What is the gas that is produced?

2. What is the chemical formula of the gas?

3. How could you test rocks for the presence of limestone?

4. Write a balanced chemical equation for the reaction of limestone with hydrochloric acid.