Methyl violet belongs to a large class of chemicals called acid-base indicators. These substances change color in solution when the hydrogen ion concentration changes. The actual formula for methyl violet is quite complicated, so we'll use the abbreviation HMV. This notation suggests that methyl violet is itself a weak organic acid. In solution, methyl violet dissociates as follows: HMV(ag)-yellow + H*(ag) + MV(ag)-violet (2) According to the video : (a) What are the colors of methyl violet in an acidic medium , and in a neutral environment ? (b) What was the acidic pH_ What was the neutral pH_ (c) Predict what will happen to the color if HCl solution is added to the reaction system ? (d) What will happen if NaOH is added ?

Methyl violet belongs to a large class of chemicals called acid-base indicators. These substances change color in solution when the hydrogen ion concentration changes. The actual formula for methyl violet is quite complicated, so we'll use the abbreviation HMV. This notation suggests that methyl violet is itself a weak organic acid. In solution, methyl violet dissociates as follows: HMV(ag)-yellow + H*(ag) + MV(ag)-violet (2) According to the video : (a) What are the colors of methyl violet in an acidic medium , and in a neutral environment ? (b) What was the acidic pH_ What was the neutral pH_ (c) Predict what will happen to the color if HCl solution is added to the reaction system ? (d) What will happen if NaOH is added ?

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

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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