Select indicators from Table 15-2 that would be suitable for finding the end point in Figure 15-3. What color changes would be observed? Figure 15-3 TABLE 15-2 Redox indicators Color Indicator Oxidized Reduced E° Phenosafranine Red Colorless 0.28 Indigo tetrasulfonate Methylene blue Diphenylamine 4'-Ethoxy-2,4-diaminoazobenzene Diphenylamine sulfonic acid Diphenylbenzidine sulfonic acid Tris(2,2'-bipyridine)iron Tris(1,10-phenanthroline)iron (ferroin) Tris(5-nitro-l,10-phenanthroline)iron Tris(2,2'-bipyridine)ruthenium Blue Colorless 0.36 Blue Colorless

Chapter 15, Problems #6

Select indicators from Table 15-2 that would be suitable for finding the end point in Figure 15-3. What color changes would be observed?


TABLE 15-2 Redox indicators Color Indicator Oxidized Reduced E° Phenosafranine Red Colorless 0.28 Indigo tetrasulfonate Methylene blue Diphenylamine 4'-Ethoxy-2,4-diaminoazobenzene Diphenylamine sulfonic acid Diphenylbenzidine sulfonic acid Tris(2,2'-bipyridine)iron Tris(1,10-phenanthroline)iron (ferroin) Tris(5-nitro-l,10-phenanthroline)iron Tris(2,2'-bipyridine)ruthenium Blue Colorless 0.36 Blue Colorless 0.53 Violet Colorless 0.75 Yellow Red 0.76 Red-violet Colorless 0.85 Violet Colorless 0.87 Pale blue


Figure 15-3


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Related Book For answer-question

Quantitative Chemical Analysis

8th edition

Authors: Daniel C. Harris

ISBN: 978-1429218153