**Buffer Solution Preparation****Problem Statement:**A buffer is made up of 2.0 mL of 0.1 M HC₂H₃O₂ and 20.0 mL of 0.1 M NaC₂H₃O₂. The pH of the buffer solution is 4.77. What is the pKₐ?**Hint:**Use the Henderson-Hasselbalch equation:\[ \text{pH} = \text{p}K_a + \log \left(\frac{[\text{B}^-]}{[\text{HB}]}\right) \]Alternatively, if the concentrations are the same:\[ \text{pH} = \text{p}K_a + \log \left(\frac{\text{Volume of B}^{-}}{\text{Volume of HB}}\right) \]**Detailed Explanation:**- **HC₂H₃O₂** (acetic acid) is the weak acid (HB).- **NaC₂H₃O₂** (sodium acetate) provides the conjugate base (\[ \text{B}^- \]).To find the pKₐ of the weak acid (HB), you can rearrange the Henderson-Hasselbalch equation:\[ \text{p}K_a = \text{pH} - \log \left(\frac{[\text{B}^-]}{[\text{HB}]}\right) \]Since the molar concentrations of HC₂H₃O₂ and NaC₂H₃O₂ are both 0.1 M and their volumes are given, if you convert to the volume approach:\[ \text{p}K_a = \text{pH} - \log \left(\frac{\text{Volume of B}^{-}}{\text{Volume of HB}}\right) \]Using the provided volumes:- Volume of HB (HC₂H₃O₂) = 2.0 mL- Volume of B⁻ (NaC₂H₃O₂) = 20.0 mLSo,\[ \text{p}K_a = 4.77 - \log \left(\frac{20.0}{2.0}\right) \]Calculate the ratio:\[ \frac{20.0}{2.0} = 10

Since the concentration of acid HC2H3O2 and NaC2H3O2 is given same and is 0.1 M Hence using…

A buffer is made up of 2.0 mL of 0.1 M HC2H3O2 and 20.0 mL of 0.1 M N a C2H3O2. The pH of the buffer solution is 4.77. What is the pKą? HINT : Use pH = pKa + log ([B minus]/[HB]) or, if concentrations are the same, pH = pKa + log (Volume of B minus/ Volume of HB)

A buffer is made up of 2.0 mL of 0.1 M HC2H3O2 and 20.0 mL of 0.1 M N a C2H3O2. The pH of the buffer solution is 4.77. What is the pKą? HINT : Use pH = pKa + log ([B minus]/[HB]) or, if concentrations are the same, pH = pKa + log (Volume of B minus/ Volume of HB)

Chemistry

10th Edition

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

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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