Time (sec.) pH of distilled water pH of buffered solution 20 7.99 8.61 40 7.46 8.43 60 7.15 8.31 80 6.75 8.22 100 6.54 8.16 120 6.39 8.10 140 6.22 8.05 160 6.11 8.01 180 6.03 7.97 Conclusion Explain your observations from the data table. Which resists a change in pH the most, water or the buffered solution? Give reasons. When you blow into the water, the pH goes up. Is the solution becoming more basic or acidic? A buffer is usually made of a weak acid and a weak base. When you blow into a buffer the pH doesn’t change. What do you think is happening?
Time (sec.) pH of distilled water pH of buffered solution 20 7.99 8.61 40 7.46 8.43 60 7.15 8.31 80 6.75 8.22 100 6.54 8.16 120 6.39 8.10 140 6.22 8.05 160 6.11 8.01 180 6.03 7.97 Conclusion Explain your observations from the data table. Which resists a change in pH the most, water or the buffered solution? Give reasons. When you blow into the water, the pH goes up. Is the solution becoming more basic or acidic? A buffer is usually made of a weak acid and a weak base. When you blow into a buffer the pH doesn’t change. What do you think is happening?
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...
Related questions
Question
|
Time (sec.)
|
pH of distilled water |
pH of buffered solution |
|
20 |
7.99 |
8.61 |
|
40 |
7.46 |
8.43 |
|
60 |
7.15 |
8.31 |
|
80 |
6.75 |
8.22 |
|
100 |
6.54 |
8.16 |
|
120 |
6.39 |
8.10 |
|
140 |
6.22 |
8.05 |
|
160 |
6.11 |
8.01 |
|
180 |
6.03 |
7.97 |
Conclusion
- Explain your observations from the data table.
- Which resists a change in pH the most, water or the buffered solution? Give reasons.
- When you blow into the water, the pH goes up. Is the solution becoming more basic or acidic?
A buffer is usually made of a weak acid and a weak base. When you blow into a buffer the pH doesn’t change. What do you think is happening?
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