What happens when you add acetic acid to sodium bicarbonate?

What Happens When You Mix Vinegar and Baking Soda?

Ever tried mixing vinegar and baking soda in the kitchen? That classic fizzing reaction you see is actually a simple but fascinating chemical process. Vinegar contains acetic acid, while baking soda is chemically known as sodium bicarbonate. When these two combine, especially in water, they trigger an acid-base reaction—essentially a neutralisation.

The result? The mixture quickly produces carbon dioxide gas, which bubbles up and creates the familiar foaming effect. This is why the combo is often used in DIY volcanoes or as a natural drain cleaner—it’s all about that energetic release of gas.

Beyond the bubbles, the reaction also forms two quieter byproducts: sodium acetate, a salt commonly used in heating pads and food preservation, and plain water. While the fizz grabs your attention, the real chemistry happens behind the scenes, leaving behind a neutral solution once the reaction settles.

This everyday reaction isn’t just fun to watch—it’s a perfect example of how chemistry plays out in daily life. From cleaning surfaces to leavening baked goods, the acetic acid and sodium bicarbonate duo is more useful than you might think. Just a splash of vinegar, a spoonful of baking soda, and you’ve got science in action.