Question

When Gerald mixes baking soda and vinegar, the materials combine to turn into a gas. What can Gerald assume occurred?

a chemical change
a physical change
combustion
precipitation

Answer 1

Gerald can assume that a **chemical change** occurred. When baking soda (sodium bicarbonate) and vinegar (acetic acid) are mixed, they undergo a chemical reaction that produces carbon dioxide gas, water, and sodium acetate. The formation of gas and new substances indicates that a chemical change has taken place.