How does adding a salt of the conjugate base of a weak acid (adding a common ion) affect the percent ionization of the weak acid in solution? O The percent ionization could either increase or decrease depending on the acid O The percent ionization could either increase or decrease depending on the ion O The percent ionization increases O The percent ionization remains unchanged O The percent ionization decreases

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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**Question:**

How does adding a salt of the conjugate base of a weak acid (adding a common ion) affect the percent ionization of the weak acid in solution?

**Options:**

- The percent ionization could either increase or decrease depending on the acid.
- The percent ionization could either increase or decrease depending on the ion.
- The percent ionization increases.
- The percent ionization remains unchanged.
- The percent ionization decreases.

**Explanation:**

This question explores the concept of the common ion effect in weak acid solutions. When a salt containing the conjugate base of the weak acid is added, it typically causes the percent ionization of the acid to decrease. This phenomenon occurs because the additional conjugate base from the salt shifts the equilibrium position, suppressing further ionization of the weak acid, thus illustrating Le Chatelier's principle.
Transcribed Image Text:**Question:** How does adding a salt of the conjugate base of a weak acid (adding a common ion) affect the percent ionization of the weak acid in solution? **Options:** - The percent ionization could either increase or decrease depending on the acid. - The percent ionization could either increase or decrease depending on the ion. - The percent ionization increases. - The percent ionization remains unchanged. - The percent ionization decreases. **Explanation:** This question explores the concept of the common ion effect in weak acid solutions. When a salt containing the conjugate base of the weak acid is added, it typically causes the percent ionization of the acid to decrease. This phenomenon occurs because the additional conjugate base from the salt shifts the equilibrium position, suppressing further ionization of the weak acid, thus illustrating Le Chatelier's principle.
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