Structure & Reactivity in Chemistry

Concepts of Acids and Bases


AB13.  Effects on Basicity (Attraction for Proton)

All of the factors that we have discussed for Bronsted acidity, or the ability of a compound to provide a proton to its surroundings, have an effect on basicity as well.  In other words, factors like nuclear charge / electron affinity influence how strongly a compound will attract or bind a proton.

In summary:

These factors are generally complementary to the effects on acidity.  A factor that makes a Bronsted acid more acidic usually makes the corresponding conjugate base less basic.

However, sometimes things can be more subtle. 

Problem AB13.1.

Rank the following in terms of base strength (1 = strongest base).


This site is written and maintained by Chris P. Schaller, Ph.D., College of Saint Benedict / Saint John's University (with contributions from other authors as noted).  It is freely available for educational use.

Creative Commons License
Structure & Reactivity in Organic, Biological and Inorganic Chemistry by Chris Schaller is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License

Send corrections to


Back to Acidity Index

Back to Structure & Reactivity Web Materials

Back to Chemistry

Back to CSB/SJU