Which solvent has a C=O stretch at a slightly higher frequency than ketones?

A student reports λ = 6.10 µm for a band. What is the wavenumber (cm^-1)? Use ṽ=10,000/λ. Round to nearest 5 cm^-1.

Which of the following are acceptable ways to improve a weak ATR spectrum for a liquid droplet?

Adding acid to water (not water to acid) is the safer practice when preparing nitric acid solutions.

Background spectra are collected after each sample to remove solvent signals.

TO CLEAN the FTIR only use [IA] and a [Q]. Do not use ChemWipes for risk of scratching the diamond.

For dilute aqueous solutions, 5.00 ppm Ca is approximately 5.00 mg/L Ca.

The most defensible criterion for selecting a final analytical line is:

For edible oils (triglycerides), the most diagnostic carbonyl band is typically near:

What is the fingerprint region in an FT-IR spectrum?