A solution of a weak acid was tested with the following indicators and the colors noted: Methyl Violet - violet Thymol Blue - yellow Methyl Yellow - yellow Congo red - orange-red Bromcresol green - blue What is the approximate pH of the solution? 1 to 2 2 to 3 3 to 4 4 to 5 5 to 6

A solution of a weak acid was tested with the following indicators and the colors noted: Methyl Violet - violet Thymol Blue - yellow Methyl Yellow - yellow Congo red - orange-red Bromcresol green - blue What is the approximate pH of the solution? 1 to 2 2 to 3 3 to 4 4 to 5 5 to 6

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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Question

### Testing the pH of a Weak Acid Solution

A solution of a weak acid was tested using several indicators. The colors observed for each indicator are noted below:

- **Methyl Violet**: violet
- **Thymol Blue**: yellow
- **Methyl Yellow**: yellow
- **Congo Red**: orange-red
- **Bromcresol Green**: blue

#### Question:
What is the approximate pH of the solution based on these observations?

#### Options:
- ○ 1 to 2
- ○ 2 to 3
- ○ 3 to 4
- ○ 4 to 5
- ○ 5 to 6

Use the above information and color changes to determine the most likely pH range of the solution.

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