When a science fair volcano bubbles and fizzes, which chemical property is being demonstrated?

• A. A chemical reaction producing a gas
• B. Evaporation of water from the mixture
• C. Dissolving of baking soda in vinegar
• D. A physical change in the shape of the volcano

Answer: (A)

Verified step by step guidance

1. Identify the key observation: the volcano bubbles and fizzes, which indicates the production of gas bubbles.
2. Recall that a chemical property describes a substance's ability to undergo a specific chemical change, such as reacting to form new substances.
3. Consider the options: evaporation is a physical change involving phase change, dissolving is a physical process without new substances formed, and a physical change in shape does not involve chemical transformation.
4. Recognize that bubbling and fizzing typically result from a chemical reaction that produces a gas as a new substance, such as carbon dioxide formed when baking soda reacts with vinegar.
5. Conclude that the bubbling and fizzing demonstrate a chemical reaction producing a gas, which is a chemical property.