Module 8
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1. Module 8
1.16. Page 5
Module 8—Acid-Base Equilibrium
Lesson Summary
In Lesson 3 you considered the following questions:
- What occurs during a chemical reaction between an acid and a base?
- How does the Brønsted-Lowry theory support what is known about the equilibrium of aqueous acids and bases?
- How do conjugate acid-base pairs form an equilibrium system?
The Brønsted-Lowry concept states that acids act as proton donors and bases act as proton acceptors during chemical reactions. This concept explains the observations of acidic or basic properties of substances that previous theories could not explain.
Further empirical evidence to support this concept comes from the changes to pH that occur during some chemical reactions. These changes can only be explained if it is assumed that a proton transfer has occurred between reacting species.
Finally, you learned to consider a Brønsted-Lowry reaction in terms of conjugate pairs of acids and bases, and you learned about the potential of these systems to act in equilibrium.