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ERIC Number: EJ1175856
Record Type: Journal
Publication Date: 2018-Apr
Pages: 7
Abstractor: As Provided
ISSN: ISSN-0021-9584
Applying Le Cha^telier's Principle to Model Strong Acid-Strong Base Titration
Mercier, Philippe H.
Journal of Chemical Education, v95 n4 p521-527 Apr 2018
Le Châtelier's principle is used as a basis to derive an expression to calculate solution pH during titrations that involve only strong acids and strong bases. Central to this model are the reaction quotient and a re-equilibration term that represents the extent of neutralization during a titration. Unlike the method traditionally taught to students to determine the pH of these acid-base mixtures, the expression obtained is exact and applies throughout the entire range of a titration curve without the need for modification or segmentation. The expression is the same as one that is obtainable using charge balance; however, the present derivation applies Le Châtelier's principle instead, and therefore remains within the scope of a general chemistry curriculum. Instructors are then able to reinforce and deepen understanding of previously learned concepts in acid-base chemistry while connecting them to chemical equilibrium and titration curves.
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A