Effect of Concentration on Reaction Speed


  • Somvang Phimmavong Department of Chemistry, Faculty of Science, National University of Laos, Laos




Reaction, Concentration, Temperature


This study aimed to investigate the effect of concentration on reaction speed, so that we can find out more about the relationship between reaction rates and factors that influence reaction rates, namely temperature and the concentration of reagents. 10 test tubes are provided on the tube rack, 5 tubes filled with 5 mL H2SO4 (fixed concentration), 5 tubes filled with 5 mL, 4 mL, 3 mL, 2 mL, 1 mL Na2S2O3 0.1 M diluted to volume 5 mL with distilled water. Mix the contents of the tube from the first 5 preparations into the second preparation. The results show that the higher the concentration, the faster the reaction rate. Conversely, the lower the concentration, the slower the reaction rate.


American Water Works Association. (2006). Water Chlorination/Chloramination Practices and Principles (Vol. 20). Amer Water Works Assn.

Chan, J., Dodani, S. C., & Chang, C. J. (2012). Reaction-based small-molecule fluorescent probes for chemoselective bioimaging. Nature chemistry, 4(12), 973-984.

Cornish-Bowden, A. (2013). Fundamentals of enzyme kinetics. John Wiley & Sons.

Hixson, A. W., & Crowell, J. H. (1931). Dependence of reaction velocity upon surface and agitation. Industrial & Engineering Chemistry, 23(8), 923-931.

Oxtoby, D. W., Gillis, H. P., & Butler, L. J. (2015). Principles of modern chemistry. Cengage learning.

Patil, S., Katre, Y. R., & Singh, A. K. (2007). A kinetic and mechanistic study on the oxidation of hydroxy acids by N-bromophthalimide in the presence of a micellar system. Journal of Surfactants and Detergents, 10(3), 175-184.

Sharma, A., Kodgire, P., & Kachhwaha, S. S. (2019). Biodiesel production from waste cotton-seed cooking oil using microwave-assisted transesterification: Optimization and kinetic modeling. Renewable and Sustainable Energy Reviews, 116, 109394.

Smith, I. W. (2008). The temperature-dependence of elementary reaction rates: beyond Arrhenius. Chemical Society Reviews, 37(4), 812-826.