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 =

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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 =** [________] (\( \checkmark \) \( \leftrightarrow \) ?)]
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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