Given that the pKa for Acetic Acid is 4.77, calculate the expected pH of the buffer solutions using the Henderson-Hasselbalch equation and the concentrations of Acetic Acid and Acetate added to the 250 ml Erlenmeyer flask
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To calculate the expected pH of a buffer solution using the Henderson-Hasselbalch equation, you need to know the concentration of the acid (Acetic Acid) and its conjugate base (Acetate) in the solution. Then, you can use the following formula:
pH = pKa + log([Acetate]/[Acetic Acid])
In this case, you mentioned that you have the concentrations of Acetic Acid and Acetate that were added to a 250 ml Erlenmeyer flask. Let's assume the concentration of Acetic Acid is [Acetic Acid] M and the concentration of Acetate is [Acetate] M.
Now, substitute the values into the Henderson-Hasselbalch equation to find the expected pH.
pH = 4.77 + log([Acetate]/[Acetic Acid])
Note: The concentrations [Acetate] and [Acetic Acid] must be in the same units (molarity) for the equation to work.
By calculating the log of the ratio of the concentrations, we can determine the pH of the buffer solution.