Question

Baking soda (sodium bicarbonate) dissolved in the water, releasing carbon dioxide. Why was it important to add the baking soda?

Answer 1

The reaction of sodium bicarbonate (baking soda) and acetic acid (vinegar) produces carbon dioxide gas, water and sodium acetate (soluble in water). The carbon dioxide gas can originally be seen as bubbles in the solution, but will quickly be released from the solution.