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 Bromcresol green - green What is the approximate pH of the solution? 1 to 2 2 to 3 3 to 4 4 to 5 5 to 6

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Chapter1: Chemical Foundations
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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
Bromcresol green - green
What is the approximate pH of the solution?
1 to 2
2 to 3
3 to 4
4 to 5
5 to 6
Transcribed Image Text: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 Bromcresol green - green What is the approximate pH of the solution? 1 to 2 2 to 3 3 to 4 4 to 5 5 to 6
The pH range of a solution can also be determined using indicators. Indicators are molecules
that exhibit different colors over a specific pH range. Examples of indicators and the associated
colors are shown below.
pH Range and Colors
1 2 3
Indicator
4
6
7
Bromcresol green
|Congo Red
Methyl Yellow
Thymol Blue
Methyl Violet
pH Range and Colors
Indicator
2
3
4
5
7
Bromcresol green
yellow
Oblue
Congo Red
Methyl Yellow
Thymol Blue
Methyl Violet
Jorange-red
Dyellow
Dyellow
blue
red
red
yellow
Oviolet
Bromcresol green, for example, would be green between pH 4-5, and gradually change to blue
Transcribed Image Text:The pH range of a solution can also be determined using indicators. Indicators are molecules that exhibit different colors over a specific pH range. Examples of indicators and the associated colors are shown below. pH Range and Colors 1 2 3 Indicator 4 6 7 Bromcresol green |Congo Red Methyl Yellow Thymol Blue Methyl Violet pH Range and Colors Indicator 2 3 4 5 7 Bromcresol green yellow Oblue Congo Red Methyl Yellow Thymol Blue Methyl Violet Jorange-red Dyellow Dyellow blue red red yellow Oviolet Bromcresol green, for example, would be green between pH 4-5, and gradually change to blue
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