Problem: Fifty milliliters of a 0.10 M aqueous NaOH solution is needed to reach the equivalence point in a titration of a 50. mL sample of benzoic acid (Ka = 6.3 x 10-5). What is the pH of the solution at the equivalence point?A. 5.6B. 7.0C. 8.4D. 10.2E. none of the above

FREE Expert Solution

We are being asked to calculate the pH at the equivalence point in the titration benzoic acid with NaOH.


We will calculate the pH of the solution at the equivalence point using the following steps:

Step 1. Write the chemical equation for the reaction between NaOH and BAH (benzoic acid).
Step 2. Calculate the initial amounts of BAH and NaOH in moles before the reaction happens.
Step 3. Construct an ICF Chart.
Step 4. Calculate the new concentration of the species left in the solution.
Step 5. Calculate pH.

98% (323 ratings)
View Complete Written Solution
Problem Details

Fifty milliliters of a 0.10 M aqueous NaOH solution is needed to reach the equivalence point in a titration of a 50. mL sample of benzoic acid (Ka = 6.3 x 10-5). What is the pH of the solution at the equivalence point?

A. 5.6

B. 7.0

C. 8.4

D. 10.2

E. none of the above

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Weak Acid Strong Base Titrations concept. You can view video lessons to learn Weak Acid Strong Base Titrations. Or if you need more Weak Acid Strong Base Titrations practice, you can also practice Weak Acid Strong Base Titrations practice problems.

What is the difficulty of this problem?

Our tutors rated the difficulty ofFifty milliliters of a 0.10 M aqueous NaOH solution is neede...as high difficulty.