Soru: In a chemistry experiment, a student mixes vinegar and baking soda. Bubbles form and the mixture fizzes. What type of change is this and why?
Çözüm: This is a chemical change because a new substance is formed. When vinegar (acetic acid) reacts with baking soda (sodium bicarbonate), they produce carbon dioxide gas (the bubbles), water, and sodium acetate. The fizzing and bubble formation are evidence of a chemical reaction where the original substances change into different substances with new properties.
