Skip to content

Crunch Chemistry

The ultimate A level chemistry resource

  • Fundamentals
    • Maths skills for chemists
    • Calculations for AS and A level Chemistry
    • Working with gases
    • Atoms and ions
    • Bonding and Structure
    • Environmental chemistry
  • Inorganic chemistry
    • Redox reactions
    • Explaining the chemistry of Group 2 metals
    • Explaining the chemistry of the Group 7, the halogens
    • Nitrogen, nitrogen oxides and the nitrogen cycle
    • Trends in Period 3
    • Transition metal chemistry
  • Organic chemistry
    • How do organic reactions actually happen?
    • Stabilising carbocations through inductive and mesomeric effects
    • Alkanes and Crude Oil
    • Alkenes
    • Halogenoalkanes
    • Alcohols
    • Carbonyl compounds
    • Organic nitrogen compounds
    • Benzene and other aromatic molecules
  • Biochemistry
    • The chemistry of fats, oils and soap
    • Amino acids and polypeptides
    • What is optical isomerism?
    • Understanding the structure of proteins
    • How do enzymes catalyse reactions?
  • Physical chemistry
    • Acids, bases, buffers and pH
    • Chemical equilibria
    • Electrochemistry
    • Enthalpy changes
    • Entropy
    • Reaction kinetics
    • Solubility
  • Analytical chemistry
    • How does electromagnetic radiation affect molecules?
    • Atomic absorption and emission spectroscopy
    • Mass spectrometry
    • Infrared spectroscopy
    • Nuclear magnetic resonance spectroscopy
    • Mixed spectra long answer exam question practice
    • Everything you need to know about chromatography
    • Qualitative analysis
  • Newsletters …
  • 1:1 chemistry tuition …

Tag: infrared

Cat Links Analytical chemistry, Organic chemistry, Spectroscopy

Explaining C=O absorption bands in IR spectroscopy

Posted on February 8, 2023February 10, 2026 Sarah Parkes

Your may have noticed on the data sheet that the wavenumber for the absorption of C=O bonds very much depends

Continue readingExplaining C=O absorption bands in IR spectroscopy

Cat Links Analytical chemistry, Spectroscopy

What is infrared spectroscopy?

Posted on January 11, 2023June 9, 2025 Sarah Parkes

Infrared spectroscopy is a really useful analytical technique for determining whether there are key bonds in a molecule (C=O, O-H,

Continue readingWhat is infrared spectroscopy?

Recent Posts

  • Trending study hacks you should try (and a few you shouldn’t)!
  • Are you leveraging the A* advice in mark schemes?
  • Why are carrots orange?
  • Explaining the reactivity of substituted benzenes
  • Friedel-Crafts reactions in benzene

Recent Comments

  1. bdtkbat on When is an answer NOT actually an answer?
  2. betonredcassino on When is an answer NOT actually an answer?
  3. oxbetcasinologin on What is infrared spectroscopy?
  • Contact me!
  • About me ….
Copyright © 2026 Crunch Chemistry | Signify Education by WEN Themes
Scroll Up