What is the pH at the equivalence point in the titration of a 20.4 mL sample of a 0.444 M aqueous hypochlorous acid solution with a 0.450 M aqueous barium hydroxide solution? pH =
What is the pH at the equivalence point in the titration of a 20.4 mL sample of a 0.444 M aqueous hypochlorous acid solution with a 0.450 M aqueous barium hydroxide solution? pH =
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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![### Titration Problem: Calculating pH at the Equivalence Point
**Question:**
What is the pH at the equivalence point in the titration of a 20.4 mL sample of a 0.444 M aqueous hypochlorous acid solution with a 0.450 M aqueous barium hydroxide solution?
*Calculation Box:*
pH = [Text Box]
**Explanation:**
In order to solve this problem, you need to determine the pH at the equivalence point of the titration. This involves the following steps:
1. **Calculate moles of hypochlorous acid (HClO):**
\[ \text{Moles of HClO} = 0.444 \ \text{M} \times 20.4 \ \text{mL} \times \frac{1 \ \text{L}}{1000 \ \text{mL}} \]
2. **Calculate moles of barium hydroxide (Ba(OH)₂):**
\[ \text{Moles of Ba(OH)₂} = 0.450 \ \text{M} \times 20.4 \ \text{mL} \times \frac{1 \ \text{L}}{1000 \ \text{mL}} \]
3. **Stoichiometric calculations to find the equivalence point volumes.**
4. **Determine the pH using the balanced equation and concentrations of products at the equivalence point.**
**Additional Information:**
- Barium hydroxide is a strong base and dissociates completely in water.
- Hypochlorous acid is a weak acid.
- At the equivalence point, the amount of acid equals the amount of base.
**Notes:**
Accurate calculation of pH requires knowledge of the acid dissociation constant (Ka) for hypochlorous acid, which isn't provided in the problem but is necessary in a real application.
This example illustrates the steps and principles involved in a titration problem commonly encountered in classroom settings and standardized tests.
*[For detailed calculations and step-by-step procedures, students can refer to the accompanying instructional video or additional resources provided on this site.]*](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6ab0bbaf-7c6a-41d9-a28d-d2a0ce6f8c93%2F47d8896f-b903-4cbc-9ee3-b86e2fee3cd7%2Fmoa6ayf_processed.png&w=3840&q=75)
Transcribed Image Text:### Titration Problem: Calculating pH at the Equivalence Point
**Question:**
What is the pH at the equivalence point in the titration of a 20.4 mL sample of a 0.444 M aqueous hypochlorous acid solution with a 0.450 M aqueous barium hydroxide solution?
*Calculation Box:*
pH = [Text Box]
**Explanation:**
In order to solve this problem, you need to determine the pH at the equivalence point of the titration. This involves the following steps:
1. **Calculate moles of hypochlorous acid (HClO):**
\[ \text{Moles of HClO} = 0.444 \ \text{M} \times 20.4 \ \text{mL} \times \frac{1 \ \text{L}}{1000 \ \text{mL}} \]
2. **Calculate moles of barium hydroxide (Ba(OH)₂):**
\[ \text{Moles of Ba(OH)₂} = 0.450 \ \text{M} \times 20.4 \ \text{mL} \times \frac{1 \ \text{L}}{1000 \ \text{mL}} \]
3. **Stoichiometric calculations to find the equivalence point volumes.**
4. **Determine the pH using the balanced equation and concentrations of products at the equivalence point.**
**Additional Information:**
- Barium hydroxide is a strong base and dissociates completely in water.
- Hypochlorous acid is a weak acid.
- At the equivalence point, the amount of acid equals the amount of base.
**Notes:**
Accurate calculation of pH requires knowledge of the acid dissociation constant (Ka) for hypochlorous acid, which isn't provided in the problem but is necessary in a real application.
This example illustrates the steps and principles involved in a titration problem commonly encountered in classroom settings and standardized tests.
*[For detailed calculations and step-by-step procedures, students can refer to the accompanying instructional video or additional resources provided on this site.]*
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