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.
A gas evolution reaction is a chemical process that produces a gas, such as oxygen or carbon dioxide. In the following examples, an acid reacts with a carbonate, producing salt, carbon dioxide, and water, respectively. Nitric acid reacts with sodium carbonate to form sodium nitrate, carbon dioxide, and water: