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pH scale: How do you determine Acids vs bases & salts-strong & weak acids. What is a buffer? Your discussion post was very informative. While I was reading the book, I found out that an acid is called a proton donor, where as a base is called a proton acceptor. In 1909, the pH scale was invented by Sören Sörensen. It was originally used to measure the acidity of beer. Acids tend to turn the litmus paper red and bases turn it blue. Really strong bases are said to be slimy and slippery. Your blood pH is usually 7.35 to 7.45 and any changes to this can cause major side effects from small tremors to death. A buffer basically resists changes to pH levels by converting strong bases and acids to weak ones. Blamire, J. (2003). Understanding Chemistry-Acids and Bases. Retrieved January 17, 2020, from http://www.brooklyn.cuny.edu/bc/ahp/SDKC/Chem/SD_AcidBase.html Saladin, K. S., Gan, C. A., & Cushman, H. N. (2018). Anatomy & Physiology: The Unity of Form and Function (8th ed.). New York, NY: McGraw-Hill Education...