From the list of acid-base indicators below, select the one BEST indicator for a titration with an equivalence point at pH 4.0 (BE CAREFUL-enter indicator name EXACTLY as it appears in table): Indicator pKa Acid color Base color Methyl violet Cresol red Malachite green Thymol blue Phloxine Orange IV Benzopurpurin Methyl yellow Methyl orange Bromophenol blue Congo red Dinitrophenol Alpha-Naphthyl red Bromocresol green Methyl red Ethyl red Azolitmin (litmus) Bromocresol purple Bromothymol blue Nitrophenol Phenol red Thymol blue Phenolphthalein Alizarin yellow R Blue Yellow Blue-green Yellow Pink 0.80 Yellow 1.0 1.3 Red Yellow Red 1.7 1.8 Colorless 2.1 Red Yellow 2.8 Violet Red 3.3 3.7 4.0 4.1 4.1 4.3 Red Yellow Red Yellow Blue-violet Yellow Blue Red Yellow Yellow Blue Yellow Colorless Red 4.7 Yellow Red Colorless 5.1 5.4 5.8 6.3 red Red Yellow Yellow Colorless Yellow Yellow Colorless Yellow Blue Violet 7.0 7.2 7.9 Blue Yellow Red blue 8.9 9.4 11.0 Red red
From the list of acid-base indicators below, select the one BEST indicator for a titration with an equivalence point at pH 4.0 (BE CAREFUL-enter indicator name EXACTLY as it appears in table): Indicator pKa Acid color Base color Methyl violet Cresol red Malachite green Thymol blue Phloxine Orange IV Benzopurpurin Methyl yellow Methyl orange Bromophenol blue Congo red Dinitrophenol Alpha-Naphthyl red Bromocresol green Methyl red Ethyl red Azolitmin (litmus) Bromocresol purple Bromothymol blue Nitrophenol Phenol red Thymol blue Phenolphthalein Alizarin yellow R Blue Yellow Blue-green Yellow Pink 0.80 Yellow 1.0 1.3 Red Yellow Red 1.7 1.8 Colorless 2.1 Red Yellow 2.8 Violet Red 3.3 3.7 4.0 4.1 4.1 4.3 Red Yellow Red Yellow Blue-violet Yellow Blue Red Yellow Yellow Blue Yellow Colorless Red 4.7 Yellow Red Colorless 5.1 5.4 5.8 6.3 red Red Yellow Yellow Colorless Yellow Yellow Colorless Yellow Blue Violet 7.0 7.2 7.9 Blue Yellow Red blue 8.9 9.4 11.0 Red red
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter14: Equilibria In Acid-base Solutions
Section: Chapter Questions
Problem 37QAP: Given three acid-base indicators—methyl orange (end point at pH 4), bromthymol blue (end point at...
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