What is the wavelength of benzoic acid?

Benzoic acid has an aromatic structure and has K absorption band and B absorption band at wavelengths of 228nm and 272nm.

What is the spectrum range for UV Visible Spectroscopy?

In UV/Vis/NIR spectroscopy the ultraviolet (170 nm to 380 nm), visible (380 nm to 780 nm), and near infrared (780 nm to 3300 nm) are used.

Which sources are used for UV visible?

Two sources are commonly used in UV-Visible spectrophotometers:

• The deuterium arc lamp. Provides a good intensity continuum in the UV region and useful intensity in the visible region.
• The tungsten-halogen lamp. Yields good intensity over part of the UV spectrum and over the entire visible range.

What is the IR spectrum of benzoic acid?

Benzoic acid has an IR spectroscopy with large peaks present in the 2500 to 3300 centimeter^-1 region, in the 1680 to 1750 region, in the 1300 region and in the 900 to 1100 region. All of these absorptions coincide with functional groups present in the compound.

How are UV Vis spectra of benzoic acid measured?

In this work, the UV-vis spectra of benzoic acid (BA), the simplest aromatic carboxylic acid, in aqueous solutions at varying pH and in the presence of salts are measured experimentally. The solutions of different pH provide insights into the contributions from both the non-dissociated acid molecule and the deprotonated anionic species.

When does benzoic acid absorption reach its peak?

The absorption between 1680 and 1750 is indicative of a carbon oxygen double bond present in benzoic acid. The absorption present around 1300 is also indicative of an OH group, and it correlates with the peak between 2500 and 3300.

When does benzoic acid have an OH group?

The peak noted in the 2500 to 3300 centimeter ^-1 region is indicative of an OH group present in benzoic acid. The absorption between 1680 and 1750 is indicative of a carbon oxygen double bond present in benzoic acid.