From the indicators listed in the figure in Blackboard, which indicators besides
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Question
From the indicators listed in the figure in Blackboard, which indicators besides phenolphthalein could be used for the ascorbic acid titration? Explain your answer.
a. Thymol blue and thymolphthalein can be used because their color change takes place at the same pH as the end point of the titration of a strong acid and a weak base.
b. Thymol blue and thymolphthalein can be used because their color change takes place at the same pH as the end point of the titration of a weak acid and a strong base.
c. Methyl orange and bromphenol blue can be used because their color change takes place at the same pH as the end point of the titration of a strong acid and a strong base.
d. Methyl orange and bromphenol blue can be used because their color change takes place at the same pH as the end point of the titration of a weak acid and a weak base.
From the indicators listed in the figure in Blackboard, which indicators besides phenolphthalein could be used for the ascorbic acid titration? Explain your answer.
NG 2a. Thymol blue and thymolphthalein can be used because their color change takes place at the same pH as the end point of the titration of a strong acid and a weak base.
b. Thymol blue and thymolphthalein can be used because their color change takes place at the same pH as the end point of the titration of a weak acid and a strong base.
c. Methyl orange and bromphenol blue can be used because their color change takes place at the same pH as the end point of the titration of a strong acid and a strong base.
d. Methyl orange and bromphenol blue can be used because their color change takes place at the same pH as the end point of the titration of a weak acid and a weak base.
pH Indicator 10 12 Yellow Violet Alizarin yellow R Thymolphthalein Phenolphthalein Colorless Blue Colorless Red Thymol blue (base range) Yellow Blue Phenol red Yellow Red Yellow Blue Bromthymol blue Chlorphenol red Bromcresol green Yellow Red Yellow Blue Methyl orange Red Yellow-orange Bromphenol blue Yellow Blue-violet Yellow Thymol blue (acid range) Methyl violet Red Yellow VioletExplanation / Answer
Thymol blue and thymolpthalein is used as indicators as their colour change takes place at the Same pH as that of end point of a weak acid and a strong base.
Option b is the right answer
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