In Chapter 20, we will explore how nitriles can be converted into carboxylic acids. How would you use IR spectroscopy to monitor the progress of this reaction? Select all that apply. A-OEN H20+ R OH A carboxylic acid A nitrile Disappearance of a signal - 1700 cm 1. O Appearance of a signal - 1700 cm-1 Appearance of a broad signal between 2200 and 3600 cm-1 O Appearance of a broad signal between 3200 and 3600 cm 1 -1 O Disappearance of a signal -2200 cm-1 Disappearance of a sharp signal -3300 cm 1 Appearance of a signal ~2200 cm 1. Appearance of a sharp signal -3300 cm-1