Research Article
Open Access Peer-reviewed

Are the Stoichiometric Coefficients in a Chemical Reaction Indication of the Kinetic Orders of the Reactants? An Inspiration to Chemistry Graduate Students

Y. Sharanya1, N. Keerthana1, V. Rajeswari1, Sanjeev Rachuru2, D. A. Padmavathi1, V. Jagannadham1,, G. Ramya Sree2

1Department of Chemistry, Osmania University, Hyderabad-500007, India

2Department of Chemistry, St. Ann's College for Women, Mehdipatnam Hyderabad-500028, India

World Journal of Chemical Education. 2025, 13(4), 103-106. DOI: 10.12691/wjce-13-4-3
Received October 27, 2025; Revised November 29, 2025; Accepted December 05, 2025 #Post-Graduate students

Abstract

It is a general tendency of the students and some of the teachers of chemistry that they conceive the stoichiometric coefficients of a balanced equation of a chemical reaction are the individual kinetic orders of those reactants involved in the rate equation of that reaction. But this is not true. The stoichiometric coefficients have nothing to do with individual kinetic orders of the reactants involved in the reaction or in the rate equation. A detailed explanation with a suitable example for this misconception is provided in the present article.

Keywords:

Stoichiometric coefficients, Rate equation, Rate law, Order of a reaction
[1]  Gold, Victor, ed. (2019). The IUPAC Compendium of Chemical Terminology: The Gold Book (4th ed.). Research Triangle Park, NC: International Union of Pure and Applied Chemistry (IUPAC).View Article
 
[2]  Chrome-extension:// efaidnbmnnnibpcajpcglclefindmkaj/ http:// www.kentchemistry.com/. Labs/ iodineclock.pdf.
 
[3]  A. Indelli and J. E. Prue, J. Chem. Soc., 1959, 107-111.View Article
 
[4]  P. C. Moews, Jr. and R. H. Petrucci, Journal of Chemical Education, Volume 41, 1964, page 548.View Article
 
[5]  Jaesang Lee, Urs von Gunten, and Jae-Hong Kim, Environ. Sci. Technol., 2020.
 
[6]  P. Neta, V. Madhavan, H. Zemel, and R. W. Fessenden, J. Amer. Chem. Soc. 1977, 99, 163-164.View Article
 
[7]  George T. F. Wong, Ling-Su Zhang, Marine Chemistry, 111 (2008) 22–29.View Article
 
[8]  V. Jagannadham, Khimiya/Chemistry (The Bulgarian Journal of Chemical Education), (2010) vol. 19, page 114.
 
[9]  R. Sanjeev, V. Jagannadham, Adam A Skelton, R. Veda Vrath, World Journal of Chemical Education 2.1 (2014): 4-7.