Science, Tech, Math › Science Normal Concentration Definition in Chemistry Print Normal concentration is molar concentration divided by an equivalence factor. Glow Images, Inc / Getty Images Science Chemistry Chemical Laws Basics Molecules Periodic Table Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry In Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate By Anne Marie Helmenstine, Ph.D. Anne Marie Helmenstine, Ph.D. Chemistry Expert Ph.D., Biomedical Sciences, University of Tennessee at Knoxville B.A., Physics and Mathematics, Hastings College Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels. Learn about our Editorial Process Updated on May 06, 2019 There are two meanings for "normal" in chemistry. (1) Normal or normal concentration refers to a concentration of solutes that is the same in two samples. (2) Normality is the gram equivalent weight of a solution in a solution, which is its molar concentration divided by an equivalence factor. It is used in situations where molarity or molality might be confusing or else difficult to determine. Normal concentration is also known as normality, N, isotonic. Examples (1) A 9% salt solution has a normal concentration with respect to most human body fluids.(2) A 1 M sulfuric acid (H2SO4) is 2 N for acid-base reactions because each mole of sulfuric acid provides 2 moles of H+ ions. A 2 N solution is called a 2 normal solution. Cite this Article Format mla apa chicago Your Citation Helmenstine, Anne Marie, Ph.D. "Normal Concentration Definition in Chemistry." ThoughtCo, Aug. 27, 2020, thoughtco.com/definition-of-normal-concentration-605417. Helmenstine, Anne Marie, Ph.D. (2020, August 27). Normal Concentration Definition in Chemistry. Retrieved from https://www.thoughtco.com/definition-of-normal-concentration-605417 Helmenstine, Anne Marie, Ph.D. "Normal Concentration Definition in Chemistry." ThoughtCo. https://www.thoughtco.com/definition-of-normal-concentration-605417 (accessed April 27, 2024). copy citation