A buffer solution contains 0.368 M NaH₂PO4 and 0.232 M K₂HPO4. Determine the pH change when 0.055 mol HCIO4 is added to 1.00 L of the buffer. pH change = 0.05

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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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### Buffer Solution pH Change Analysis

A buffer solution is composed of two main components:
- 0.368 M \( \text{NaH}_2\text{PO}_4 \)
- 0.232 M \( \text{K}_2\text{HPO}_4 \)

**Objective:**  
To determine the pH change when 0.055 mol of \( \text{HClO}_4 \) is added to 1.00 L of the buffer solution.

**Calculated pH Change:**  
The pH change is calculated to be 0.05.
Transcribed Image Text:### Buffer Solution pH Change Analysis A buffer solution is composed of two main components: - 0.368 M \( \text{NaH}_2\text{PO}_4 \) - 0.232 M \( \text{K}_2\text{HPO}_4 \) **Objective:** To determine the pH change when 0.055 mol of \( \text{HClO}_4 \) is added to 1.00 L of the buffer solution. **Calculated pH Change:** The pH change is calculated to be 0.05.
**Buffer Solution pH Change Calculation**

A buffer solution contains 0.298 M CH₃NH₃Br and 0.350 M CH₃NH₂ (methylamine). Determine the pH change when 0.089 mol HI is added to 1.00 L of the buffer. (Assume \( K_b \) (CH₃NH₂) = \( 4.2 \times 10^{-4} \).)

**Formula:**
\[ \text{pH after addition} - \text{pH before addition} = \text{pH change} = \underline{\qquad\qquad\qquad} \]

This formulation guides students through calculating the pH change in a buffer solution when a strong acid is introduced.
Transcribed Image Text:**Buffer Solution pH Change Calculation** A buffer solution contains 0.298 M CH₃NH₃Br and 0.350 M CH₃NH₂ (methylamine). Determine the pH change when 0.089 mol HI is added to 1.00 L of the buffer. (Assume \( K_b \) (CH₃NH₂) = \( 4.2 \times 10^{-4} \).) **Formula:** \[ \text{pH after addition} - \text{pH before addition} = \text{pH change} = \underline{\qquad\qquad\qquad} \] This formulation guides students through calculating the pH change in a buffer solution when a strong acid is introduced.
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