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This laboratory experiment aimed to explore the properties of acids and bases using two different pH indicators, namely universal pH indicator paper and a red cabbage pH indicator. The primary objective was to determine the pH of various solutions and establish a key for the cabbage pH indicator. Additionally, household solutions were tested to determine their pH levels using the cabbage pH indicator.
Acids and bases are fundamental concepts in chemistry, and their properties can be characterized by their pH levels.
pH is a measure of the hydrogen ion concentration ([H+]) in a solution. In this experiment, two pH indicators were utilized: universal pH indicator paper and a homemade red cabbage pH indicator.
Gather all necessary materials listed above.
For the acids, calculate the pH using the formula pH = -log[H+].
For water, consider it neutral. For the bases, analyze and extend the pattern to determine the pH.
Dispose of all materials according to your teacher's directions.
Solution | pH | Indicator Color | pH Range (low-high) |
---|---|---|---|
0.1 M HCl | 1 | Red | 1-2 |
0.001 M HCl | 3 | Orange | 3-4 |
0.00001 M HCl | 5 | Yellow | 5-6 |
Distilled Water | 7 | Green | 7 |
0.00001 M NaOH | 9 | Blue | 8-9 |
0.001 M NaOH | 11 | Purple | 10-11 |
0.1 M NaOH | 13 | Purple | 12-13 |
pH Range (low-high) | Cabbage Indicator Color |
---|---|
1-2 | Red |
3-4 | Orange |
5-6 | Yellow |
7 | Green |
8-9 | Blue |
10-11 | Purple |
12-13 | Purple |
Solution | Cabbage Indicator Color | pH Range (low-high) | Acidic, Neutral, or Basic |
---|---|---|---|
Lemon Juice | Yellow | 5-6 | Acidic |
Hand Sanitizer | Green | 7 | Neutral |
Soap/Dishwashing Liquid | Blue | 8-9 | Basic |
The hypothesis that a red cabbage solution can be used to determine the pH of a solution was confirmed. The pH of various solutions was successfully determined using both universal pH indicator paper and the cabbage pH indicator. The colors observed with the cabbage indicator matched the pH ranges established for the control solutions. The household solutions were determined to be acidic, neutral, or basic based on their respective pH values. Overall, the experiment provided a practical demonstration of the principles of acids, bases, and pH measurement.
Lab Report: Exploration of Acids and Bases. (2024, Jan 09). Retrieved from https://studymoose.com/document/lab-report-exploration-of-acids-and-bases
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