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(ii) Phenolphthalein indicator represented by HIn, is a weak acid that dissociates in water as follows: Hln(aq) + H*(aq)+ In (aq) Colourless red colour Explain the colour change observed at the end point of an acid-base titration where phenolphthalein is used as indicator with the acid in the conical flask.

(ii) Phenolphthalein indicator represented by HIn, is a weak acid that dissociates in water as follows: Hln(aq) + H*(aq)+ In (aq) Colourless red colour Explain the colour change observed at the end point of an acid-base titration where phenolphthalein is used as indicator with the acid in the conical flask.

Chemistry
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
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Answer (i) & (ii) showing all steps

(f) (1) Define an acid according to Bronsted and Lowry. (ii) Phenolphthalein indicator represented by HIn, is a weak acid that dissociates in water as follows: Hln(aq) + H*(aq)+ In (aq) Colourless red colour Explain the colour change observed at the end point of an acid-base titration where phenolphthalein is used as indicator with the acid in the conical flask. (iii) The pH range of phenolphthalein is 8.2 - 10. Give an acid and an alkali for which phenolphthalein is suitable as an indicator during titration (iv) The OH- ion concentration in a dilute ammonia solution is 0.0025 M.Calculate the pH of the solutions
Transcribed Image Text:(f) (1) Define an acid according to Bronsted and Lowry. (ii) Phenolphthalein indicator represented by HIn, is a weak acid that dissociates in water as follows: Hln(aq) + H*(aq)+ In (aq) Colourless red colour Explain the colour change observed at the end point of an acid-base titration where phenolphthalein is used as indicator with the acid in the conical flask. (iii) The pH range of phenolphthalein is 8.2 - 10. Give an acid and an alkali for which phenolphthalein is suitable as an indicator during titration (iv) The OH- ion concentration in a dilute ammonia solution is 0.0025 M.Calculate the pH of the solutions
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