Recall that

- Weak acid and strong base titration
- pH gradually increases as it approaches the equivalence point
- pH at the equivalence point is more than 7.00

- Strong acid and strong base titration
- pH rapidly increases as it approaches the equivalence point
- pH at the equivalence point is equal to 7.00

**Part A.**

We will approximate the pH by determining the pH that corresponds to the volume at the equivalence point

The graphs below labeled (a) and (b) show the titration curves for two equal-volume samples of monoprotic acids, one weak and one strong. Both titrations were carried out with the same concentration of strong base.

**Part A**

What is the approximate pH at the equivalence point of (a) curve? (Figure 1)

Express your answer as a whole number?

**Part B**

What is the approximate pH at the equivalence point of (b) curve?(Figure 2)

Express your answer as a whole number.

**Part C**

Which curve corresponds to the titration of the strong acid and which one to the titration of the weak acid?

A. Graph (a) represents a weak acid and graph (b) represents a strong acid.

B. Graph (b) represents a weak acid and graph (a) represents a strong acid.

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 Acid and Base Titration Curves concept. You can view video lessons to learn Acid and Base Titration Curves. Or if you need more Acid and Base Titration Curves practice, you can also practice Acid and Base Titration Curves practice problems.

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