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.
Introduce the activity. Students know that baking soda and vinegar produce a gas. As a demonstration, combine vinegar, detergent, and baking soda in a graduated cylinder so that the foam overflows. Procedure Use a graduated cylinder to measure 10 ml of vinegar.