Yes, you can mix vinegar and baking soda. Just don't expect the fizz to do much cleaning — the reaction is mostly on for show.
The vinegar-and-baking-soda combo shows up in every natural cleaning list, mostly because the reaction is visually dramatic. People assume big bubbles mean big cleaning power.
Chemically, what's happening is an acid-base reaction that produces carbon dioxide gas, water, and sodium acetate. Once the fizzing stops, you're left with a mild, slightly salty liquid, not a supercharged cleaner.
Vinegar is roughly 5% acetic acid, and baking soda is sodium bicarbonate, a base. When they meet, they react almost instantly, producing carbon dioxide bubbles, water, and sodium acetate. The dramatic fizzing usually stops within one to two minutes, and what's left behind is a mild liquid with far less cleaning strength than either ingredient had before mixing.
Drains are the one place this trick earns its reputation. Pour about half a cup of baking soda down a slow drain, follow with half a cup of vinegar, let it fizz for 5 to 10 minutes, then flush with hot water. The bubbling agitation can help dislodge loose grease and hair buildup.
For grease on stovetops, soap scum in showers, or baked-on grime in ovens, using the two ingredients separately works better than combining them. Vinegar alone cuts through mineral deposits and grease; baking soda alone works as a gentle abrasive paste. Mixing them first cancels out the acid and the scrubbing power before you even start cleaning.
Never bring bleach into this combo. Adding bleach to vinegar, or any acid, releases chlorine gas, and mixing bleach with ammonia-based cleaners produces chloramine vapors — both can cause serious harm to breathe in a closed bathroom or kitchen. If a job calls for real disinfection, use bleach by itself, diluted with water, in a ventilated room.
Vinegar and baking soda are safe to combine, but the fizz is mostly a show since the reaction cancels out much of what makes each ingredient useful. Save the pairing for slow drains, and use them separately for tougher jobs like grease and soap scum.
No, the reaction doesn't reliably kill germs. For disinfecting, use a product registered for that purpose, like diluted bleach used on its own, never mixed with vinegar.
Don't seal them together — gas buildup can pop the cap or crack the bottle. Mix in an open container, or apply baking soda first and spray vinegar directly on the surface.
It works well for slow drains with light buildup, but a solid clog usually needs a plunger or a drain snake instead.
No, baking powder already contains an acid, so it won't react with vinegar the same way and makes a poor substitute for cleaning purposes.