## Using Titration to Determine the Identity of an Unknown Acid### Problem 5: An unknown acid is titrated with NaOH to obtain the following titration curve.#### Graph Description:The graph plots pH (on the y-axis) against the Volume of NaOH (in mL, on the x-axis). The curve starts at a low pH, rises steadily, then sharply increases around 50 mL, and finally levels off at a higher pH.#### Questions:a. Label the equivalence point and half-equivalence point on this curve.b. Determine the pKa of the unknown acid. Explain how you got your answer.### Explanation:- **Equivalence Point**: This is the point where the amount of acid equals the amount of base added. It is typically at the steepest part of the curve.- **Half-Equivalence Point**: This occurs where half of the acid has reacted with the base, usually halfway up the rising part of the curve. At this point, pH equals pKa.To determine the pKa, find the pH at the half-equivalence point on the graph.

The above titration curve look like weak achid vs strong base (NaOH). From Henderson-Hesselblech…

Using Titration to Determine the Identity of an Unknown Acid 5. An unknown acid is titrated with NaOH to obtain the following titration curve. pH 14 12 10 8 6 4. 2 0 0 25 50 75 Volume of NaOH (mL) 100 a. Label the equivalence point and half-equivalence point on this curve. b. Determine the pK₂ of the unknown acid. Explain how you got your answer.

Using Titration to Determine the Identity of an Unknown Acid 5. An unknown acid is titrated with NaOH to obtain the following titration curve. pH 14 12 10 8 6 4. 2 0 0 25 50 75 Volume of NaOH (mL) 100 a. Label the equivalence point and half-equivalence point on this curve. b. Determine the pK₂ of the unknown acid. Explain how you got your answer.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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