For a particular application in my lab, we often need to make a benzoic acid buffer....

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For a particular application in my lab, we often need to make a benzoic acid buffer. The chemical formula for benzoic acid is HC₂H₂CO₂. To make this buffer, let's say we start with 1.53 M sodium benzoate in 1 L of water (and assume 11 of volume throughout this problem). 1. (4 pts) Using the chemical formula information above, show the chemical reaction of benzoate with water to form products. Make sure you include the phases of matter. 2. (4 pts) What is the value of the equilibrium constant for this reaction? 3. (8 pts) What is the pH of the solution right now? 4. (9 pts) Let's say we add HCl, show the reaction that would occur. 5. (15 pts) Let's say we add 0.62 mol HCL. What is the resulting pH now? 6. (5 pts) Ok, to the solution in #5 above, after we add the HCI, we now add 0.23 mol NaOH. Identify the component in the solution with which the NaOH will react. 7. (10 pts) What is the new pH of the solution described in #6? 8. (5 pts) At which stage in here (Identify a number 1, 4, or 6) does this solution become a buffer and briefly describe why. For a particular application in my lab, we often need to make a benzoic acid buffer. The chemical formula for benzoic acid is HC₂H₂CO₂. To make this buffer, let's say we start with 1.53 M sodium benzoate in 1 L of water (and assume 11 of volume throughout this problem). 1. (4 pts) Using the chemical formula information above, show the chemical reaction of benzoate with water to form products. Make sure you include the phases of matter. 2. (4 pts) What is the value of the equilibrium constant for this reaction? 3. (8 pts) What is the pH of the solution right now? 4. (9 pts) Let's say we add HCl, show the reaction that would occur. 5. (15 pts) Let's say we add 0.62 mol HCL. What is the resulting pH now? 6. (5 pts) Ok, to the solution in #5 above, after we add the HCI, we now add 0.23 mol NaOH. Identify the component in the solution with which the NaOH will react. 7. (10 pts) What is the new pH of the solution described in #6? 8. (5 pts) At which stage in here (Identify a number 1, 4, or 6) does this solution become a buffer and briefly describe why.

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