141480 4. A student needs to prepare a buffer solution with a pH of 5.59. Assuming a pka of 4.54, how many mL of 0.1 M NaOH would need to be added to 24.0 mL of 0.1 M HB to prepare this buffer? Please include a proper (abbreviated) unit. HINT: Use pH = pKa + log ([B-]/[HB]) or, if concentrations are the same, pH = pka + log (Volume of OH-/ (Volume of HB - Volume of OH-) mis

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**Buffer Preparation Exercise:**

4. A student needs to prepare a buffer solution with a pH of 5.59. Assuming a pKa of 4.54, how many mL of 0.1 M NaOH would need to be added to 24.0 mL of 0.1 M HB to prepare this buffer? Please include a proper (abbreviated) unit.

**Hint:** Use the formula:

\[ \text{pH} = \text{pKa} + \log \left( \frac{[\text{B}^-]}{[\text{HB}]} \right) \]

Or, if concentrations are the same:

\[ \text{pH} = \text{pKa} + \log \left( \frac{\text{Volume of OH}^-}{\text{Volume of HB} - \text{Volume of OH}^-} \right) \]
Transcribed Image Text:**Buffer Preparation Exercise:** 4. A student needs to prepare a buffer solution with a pH of 5.59. Assuming a pKa of 4.54, how many mL of 0.1 M NaOH would need to be added to 24.0 mL of 0.1 M HB to prepare this buffer? Please include a proper (abbreviated) unit. **Hint:** Use the formula: \[ \text{pH} = \text{pKa} + \log \left( \frac{[\text{B}^-]}{[\text{HB}]} \right) \] Or, if concentrations are the same: \[ \text{pH} = \text{pKa} + \log \left( \frac{\text{Volume of OH}^-}{\text{Volume of HB} - \text{Volume of OH}^-} \right) \]
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