Acid-base buffering demonstration: baking soda as a buffer and its biological relevance

Apuntes

U2- Biological and industrial importance Alejandro Palacio Henao 10TH MEV, Liceo Pino Verde Osmar Julian Martinez 27-03-26 Biological and industrial importance The Challenge: Beat the Acid with Baking Soda! Materials Experimental Procedure Glass A: Control Glass B: Buffer Glass A: Control + clear soda (acid solution) Glass B: Buffer Glass A: Control + clear soda Glass B: Buffer + Baking Soda+ clear soda (neutralization) The Scientific Awakening: ● Discussion Question 1: When you added the clear soda to Glass A (Water), the color changed instantly. Why did the color in Glass B (Baking Soda/Buffer) resist the change? Use the term neutralization in your explanation. Glass A changed color right away because plain water does not do much to stop the acid in the clear soda from lowering the pH. Glass B resisted the color change because the baking soda acted as a buffer. Baking soda can react with some of the acid in the soda and weaken its effect through neutralization. The pH in Glass B stayed more stable, so the color did not change as quickly. ● Discussion Question 2: Based on this demonstration, which ingredient—the plain water in Glass A or the baking soda in Glass B—is more essentia...