An unknown solution is red with phenol red and colourless with thymolphthalein. From that information, predict the approximate pH range of the unknown solution, then determine the colour of the following indicators in that solution. Indicator thymol blue alizarin yellow R bromothymol blue Colour ◆ →

An unknown solution is red with phenol red and colourless with thymolphthalein. From that information, predict the approximate pH range of the unknown solution, then determine the colour of the following indicators in that solution. Indicator thymol blue alizarin yellow R bromothymol blue Colour ◆ →

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter15: Acid–base Equilibria

Section: Chapter Questions

Problem 55P

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Similar questions

Given three acid-base indicatorsâ€”methyl orange (end point at pH 4), bromthymol blue (end point at pH 7), and phenolphthalein (end point at pH 9)â€”which would you select for the following acid-base titrations? (a) perchloric acid with an aqueous solution of ammonia (b) nitrous acid with lithium hydroxide (c) hydrobromic acid with strontium hydroxide (d) sodium fluoride with nitric acid
An unknown solution is blue with indigo carmine and blue with thymolphthalein. From that information, predict the approximate pH range of the unknown solution, then determine the colour of the following indicators in that solution. Indicator Colour alizarin yellow R yellow/red/orange phenolphthalein colourless/pink thymol blue yellow/red/orange/green/blue
The indicator phenolphthalein may be regarded as a weak monobasic acid. Explain briefly why the indicator is coloured pink when the solution in which it is present has excess of alkali.
. (a) Which is the stronger base—the basic form of the indicator cresol red or the basic form of thymolphthalein?(b) A solution is prepared in which cresol red is red and thymolphthalein is colorless. Estimate the pH of this solution.