An analytical chemist is titrating 243.9 mL of a 0.3300M solution of ammonia (NH,) with a 0.8900M solution of HNO3. The p K, of ammonia is 4.74. Calculate the pH of the base solution after the chemist has added 53.7 mL of the HNO, solution to it. Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of HNO, solution added. Round your answer to 2 decimal places. pH =
An analytical chemist is titrating 243.9 mL of a 0.3300M solution of ammonia (NH,) with a 0.8900M solution of HNO3. The p K, of ammonia is 4.74. Calculate the pH of the base solution after the chemist has added 53.7 mL of the HNO, solution to it. Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of HNO, solution added. Round your answer to 2 decimal places. pH =
Chemistry
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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
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![### Titration Problem: Calculating the pH of an Ammonia Solution
An analytical chemist is titrating 243.9 mL of a 0.3300 M solution of ammonia (NH₃) with a 0.8900 M solution of HNO₃. The \( pK_b \) of ammonia is 4.74. Calculate the pH of the base solution after the chemist has added 53.7 mL of the HNO₃ solution to it.
**Note for advanced students:** You may assume the final volume equals the initial volume of the solution plus the volume of HNO₃ solution added.
**Round your answer to 2 decimal places.**
### Instructions:
1. **Given Data:**
- Volume of ammonia solution (V₁): 243.9 mL
- Concentration of ammonia solution (C₁): 0.3300 M
- Volume of HNO₃ solution added (V₂): 53.7 mL
- Concentration of HNO₃ solution (C₂): 0.8900 M
- \( pK_b \) of ammonia: 4.74
2. **Calculation Steps:**
- Calculate the number of moles of NH₃ and HNO₃.
- Determine the limiting reactant.
- Determine the amount of NH₃ and HNO₃ left after the reaction.
- Calculate the concentration of remaining species in the new volume.
- Use the Henderson-Hasselbalch equation to find the pH.
### User Interface:
A text box is provided for entering the pH value, accompanied by control buttons for:
- Confirming the input (\( \checkmark \))
- Resetting the input (\( \leftrightarrow \))
- Seeking additional help (\( ? \))
[Text Box: **pH =** [________] (\( \checkmark \) \( \leftrightarrow \) ?)]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F94d0adae-0d59-431d-bb8d-7ca794be653b%2F67d9cd13-0a7f-42cb-a8af-48b19e96443b%2F00soacr_processed.png&w=3840&q=75)
Transcribed Image Text:### Titration Problem: Calculating the pH of an Ammonia Solution
An analytical chemist is titrating 243.9 mL of a 0.3300 M solution of ammonia (NH₃) with a 0.8900 M solution of HNO₃. The \( pK_b \) of ammonia is 4.74. Calculate the pH of the base solution after the chemist has added 53.7 mL of the HNO₃ solution to it.
**Note for advanced students:** You may assume the final volume equals the initial volume of the solution plus the volume of HNO₃ solution added.
**Round your answer to 2 decimal places.**
### Instructions:
1. **Given Data:**
- Volume of ammonia solution (V₁): 243.9 mL
- Concentration of ammonia solution (C₁): 0.3300 M
- Volume of HNO₃ solution added (V₂): 53.7 mL
- Concentration of HNO₃ solution (C₂): 0.8900 M
- \( pK_b \) of ammonia: 4.74
2. **Calculation Steps:**
- Calculate the number of moles of NH₃ and HNO₃.
- Determine the limiting reactant.
- Determine the amount of NH₃ and HNO₃ left after the reaction.
- Calculate the concentration of remaining species in the new volume.
- Use the Henderson-Hasselbalch equation to find the pH.
### User Interface:
A text box is provided for entering the pH value, accompanied by control buttons for:
- Confirming the input (\( \checkmark \))
- Resetting the input (\( \leftrightarrow \))
- Seeking additional help (\( ? \))
[Text Box: **pH =** [________] (\( \checkmark \) \( \leftrightarrow \) ?)]
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