Question

A student has an unknown powder and wants to determine what it is. Based on appearance, the student believes it is baking soda. When performing the vinegar test, what can the student expect to happen if it is baking soda
it will crystallize into a sugar-like substance
it will bubble and foam
it will turn into a solid glass-like substance it will turn a blue-black color

Answer 1

If the unknown powder is baking soda (sodium bicarbonate), the student can expect it to **bubble and foam** when vinegar (acetic acid) is added. This reaction occurs because baking soda reacts with acidic substances, releasing carbon dioxide gas, which causes the bubbling and foaming effect.