The indicator thymol pink has a Ka = 2 x 104. At pH =1 it is yellow and at pH=14 it is pink. Which of the following statements are true (select all that apply) It is a good indicator for a weak acid with strong base titration at pH = 4 it will be yellow its end point will occur when the pH is approximately equal to 9 It is a good indicator for strong acid with weak base titration If it is added to a solution of 1 M sodium nitrite the solution will turn pink

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**Understanding Thymol Pink as a pH Indicator**

Thymol pink is an acid-base indicator with a dissociation constant \( K_a = 2 \times 10^{-4} \). It exhibits a color change depending on the pH of the solution: yellow at pH 1 and pink at pH 14.

### Statements to Evaluate

Select all true statements regarding the use of thymol pink as an indicator:

- [ ] It is a good indicator for a weak acid with strong base titration.
- [ ] At pH = 4 it will be yellow.
- [ ] Its end point will occur when the pH is approximately equal to 9.
- [ ] It is a good indicator for strong acid with weak base titration.
- [ ] If it is added to a solution of 1 M sodium nitrite, the solution will turn pink.

Consider the transition range of thymol pink and the pKa value when determining its suitability as an indicator for specific titrations or scenarios.
Transcribed Image Text:**Understanding Thymol Pink as a pH Indicator** Thymol pink is an acid-base indicator with a dissociation constant \( K_a = 2 \times 10^{-4} \). It exhibits a color change depending on the pH of the solution: yellow at pH 1 and pink at pH 14. ### Statements to Evaluate Select all true statements regarding the use of thymol pink as an indicator: - [ ] It is a good indicator for a weak acid with strong base titration. - [ ] At pH = 4 it will be yellow. - [ ] Its end point will occur when the pH is approximately equal to 9. - [ ] It is a good indicator for strong acid with weak base titration. - [ ] If it is added to a solution of 1 M sodium nitrite, the solution will turn pink. Consider the transition range of thymol pink and the pKa value when determining its suitability as an indicator for specific titrations or scenarios.
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