The following pH curve is for the titration of 20.0 mL of a 0.10 M solution of a weak monoprotic base with a 0.10 M solution of a strong monoprotic acid. Data points at 1 mL increments. a) What is the pH before any titrant has been added? b) What is the pH at the midpoint of the titratio c) What is the pH at the equivalence point? d) What is the value of K, for the weak base? 14.0 12.0 10.0 €8.0 6.0 4.0 2.0 0.0 Dobbbbbbbbbb 0.0 10.0 DDDDDDD 20.0 ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ 30.0 Volume of titrant (mL) 40.0 50.0
The following pH curve is for the titration of 20.0 mL of a 0.10 M solution of a weak monoprotic base with a 0.10 M solution of a strong monoprotic acid. Data points at 1 mL increments. a) What is the pH before any titrant has been added? b) What is the pH at the midpoint of the titratio c) What is the pH at the equivalence point? d) What is the value of K, for the weak base? 14.0 12.0 10.0 €8.0 6.0 4.0 2.0 0.0 Dobbbbbbbbbb 0.0 10.0 DDDDDDD 20.0 ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ 30.0 Volume of titrant (mL) 40.0 50.0
Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Transcribed Image Text:The following pH curve is for the titration of 20.0 mL of a 0.10 M solution of a weak monoprotic base with a 0.10 M solution of a strong monoprotic acid.
**Graph Details:**
- **Title:** pH vs. Volume of Titrant
- **X-axis:** Volume of titrant (mL), ranging from 0 to 50 mL.
- **Y-axis:** pH, ranging from 0 to 14.
- **Curve Characteristics:**
- The curve starts at a high pH (around 11.5) and decreases gradually.
- A more rapid pH drop occurs between approximately 20 mL and 25 mL of titrant, indicating the equivalence point.
- The curve flattens out around a pH of 2 after the equivalence point.
**Data points at 1 mL increments.**
**Questions:**
(a) What is the pH before any titrant has been added?
(b) What is the pH at the midpoint of the titration?
(c) What is the pH at the equivalence point?
(d) What is the value of \( K_b \) for the weak base?
Expert Solution
Step 1
Given,
pH curve .
Volume of monoprotic base =20.0 mL
concentration of strong acid = 0.1 M
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