Use the References to access impo Determine the pH change when 0.128 mol KOH is added to 1.00 L of a buffer solution that is 0.453 M in HCN and 0.289 M in CN". pH after addition- pH before addition = pH change= Submit Answer Retry Entire Group 9 more group attempts remaining

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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**Title: Calculating pH Change in a Buffer Solution**

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**Problem Statement:**

Determine the pH change when 0.128 mol KOH is added to 1.00 L of a buffer solution that is 0.453 M in HCN and 0.289 M in CN⁻.

**Calculation:**

- **pH after addition** - **pH before addition** = **pH change**

**Instructions:**

1. Calculate the initial pH of the buffer solution using the Henderson-Hasselbalch equation.
2. Determine the new concentrations of HCN and CN⁻ after the addition of KOH.
3. Recalculate the pH with the updated concentrations.
4. Find the pH change by subtracting the initial pH from the new pH.

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**Answer Submission:**

- Enter your calculated pH change in the designated field.
- Click "Submit Answer" to record your response.
- You have 9 more group attempts remaining if further attempts are required.

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**Note:** Use the [Review Topics] and [References] as needed for additional guidance and values.
Transcribed Image Text:**Title: Calculating pH Change in a Buffer Solution** --- **Problem Statement:** Determine the pH change when 0.128 mol KOH is added to 1.00 L of a buffer solution that is 0.453 M in HCN and 0.289 M in CN⁻. **Calculation:** - **pH after addition** - **pH before addition** = **pH change** **Instructions:** 1. Calculate the initial pH of the buffer solution using the Henderson-Hasselbalch equation. 2. Determine the new concentrations of HCN and CN⁻ after the addition of KOH. 3. Recalculate the pH with the updated concentrations. 4. Find the pH change by subtracting the initial pH from the new pH. --- **Answer Submission:** - Enter your calculated pH change in the designated field. - Click "Submit Answer" to record your response. - You have 9 more group attempts remaining if further attempts are required. --- **Note:** Use the [Review Topics] and [References] as needed for additional guidance and values.
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