Question

what does fizzing from dropping hydrochloric acid onto a piece of limestone indicate about the chemical reaction? the reaction absorbs light. the reaction changes in color. the reaction produces a gas.

Explanation:

Fizzing is a common sign of gas production in a chemical reaction. When hydrochloric acid reacts with limestone (calcium carbonate), the reaction \(CaCO_{3}+2HCl = CaCl_{2}+H_{2}O + CO_{2}\uparrow\) occurs, and carbon dioxide gas (\(CO_{2}\)) is released, which causes the fizzing phenomenon. Absorbing light is not related to the fizzing phenomenon, and there is no color change in this reaction that would cause fizzing.

Answer:

The reaction produces a gas.