1. Withings Body Cardio. Measures: Full-body composition, body fat, water percentage, muscle and bone mass. Perfect for: Fitness and health fiends. Selling points: Accuracy; compatible with more third-party apps and devices than the other smart scales we tested. Drawbacks: None.
In this reaction, baking soda acts as a base, and takes a proton from vinegar, which is an acid. The reaction releases gas because when the baking soda receives the proton, it transforms into water and carbon dioxide.
The Science Behind It. Baking soda {sodium bicarbonate} is a base and vinegar {acetic acid} is an acid. When combined, they react to form water, a salt {sodium acetate}, and carbon dioxide gas. The bubbles produced by the reaction {in the bottle} are the carbon dioxide gas escaping the water.