Editing Carboxylic acid (section)

=== Characterization ===
Carboxylic acids are readily identified as such by [[infrared spectroscopy]]. They exhibit a sharp band associated with vibration of the C=O carbonyl bond (''ν''<sub>C=O</sub>) between 1680 and 1725&nbsp;cm<sup>−1</sup>. A characteristic ''ν''<sub>O–H</sub> band appears as a broad peak in the 2500 to 3000&nbsp;cm<sup>−1</sup> region.<ref name=M&B/><ref>{{cite journal |last1=Smith |first1=Brian |title=The C=O Bond, Part VIII: Review |url=https://www.spectroscopyonline.com/view/co-bond-part-viii-review |website=Spectroscopy |series=November 2018 |date=November 2018 |volume=33 |pages=24–29 |access-date=12 February 2024}}</ref> By <sup>1</sup>H [[Nuclear magnetic resonance|NMR]] spectrometry, the [[hydroxyl]] hydrogen appears in the 10–13 ppm region, although it is often either broadened or not observed owing to exchange with traces of water.{{cn|date=May 2025}}