ONLY NUMBER 4, WILL GIVE THUMBS UP A mixture is prepared by combining 100 mL of 0.0200 F benzoic acid (pKa = 4.20) and 100 mL of 0.0200F acetic acid (pKa = 4.75). 1. Write the equations that would be used for a systematic treatment of this equilibrium. This should include charge balance equation, any applicable mass balance equations, and equilibrium expressions for both acids and water. 2. Use substitution into the charge balance equation to arrive at an equation for (H']. This equation should look like [H*] = A+B + C, where A, B, and C each represent one of the anions in the charge balance equation. The A, B and C terms will most likely include [H*]. 3. Determine what the pH would be if only the stronger acid was present. This should be easy. 4. How many mL of 0.0100 M NAOH are required to make the pH of the solution =5? You can do this step with only your knowledge of buffers.

ONLY NUMBER 4, WILL GIVE THUMBS UP A mixture is prepared by combining 100 mL of 0.0200 F benzoic acid (pKa = 4.20) and 100 mL of 0.0200F acetic acid (pKa = 4.75). 1. Write the equations that would be used for a systematic treatment of this equilibrium. This should include charge balance equation, any applicable mass balance equations, and equilibrium expressions for both acids and water. 2. Use substitution into the charge balance equation to arrive at an equation for (H']. This equation should look like [H] = A+B + C, where A, B, and C each represent one of the anions in the charge balance equation. The A, B and C terms will most likely include [H]. 3. Determine what the pH would be if only the stronger acid was present. This should be easy. 4. How many mL of 0.0100 M NAOH are required to make the pH of the solution =5? You can do this step with only your knowledge of buffers.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter31: Introduction To Analytical Separations

Section: Chapter Questions

Problem 31.17QAP

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