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Vlog

Last updated

16 April 2026

pptx, 3.14 MB
pptx, 3.14 MB

This PowerPoint lesson covers infrared (IR) spectroscopy for IBDP Chemistry HL (first examination 2025), focusing on identifying functional groups and interpreting spectra. It provides a clear, structured approach to analysing IR data and linking absorption peaks to molecular structure.

Infrared spectroscopy is an analytical technique used to identify the types of bonds present in a compound based on how they absorb infrared radiation. Chemical bonds vibrate at specific frequencies, and when IR radiation of the correct frequency is absorbed, these vibrations increase. Different bonds absorb characteristic frequencies, allowing chemists to identify functional groups and infer structural features of molecules .

This fully editable PowerPoint (.pptx) is designed for HL teaching and revision within the IB Diploma Programme. The lesson introduces the key regions of an IR spectrum, including the functional group region (above 1500 cm⁻¹) and the fingerprint region (below 1500 cm⁻¹), helping students understand how each region is used in analysis . Students are guided through interpreting spectra using characteristic absorption peaks, with clear examples such as alcohols, aldehydes and carboxylic acids.

The resource includes:
• Retrieval starter activity linking to mass spectrometry
• Clear definitions of key terms such as functional group region, fingerprint region and IR active
• Explanation of bond vibrations (stretching and bending)
• Identification of characteristic absorption peaks (e.g. O–H, C=O, C–H)
• Worked examples of IR spectra (ethanol, ethanoic acid, ethanal)
• Use of IR spectroscopy to identify unknown compounds
• Link to greenhouse gases and IR absorption in climate science
• Practice questions with answers for consolidation

This lesson is ideal for developing analytical skills and preparing students for exam-style questions involving interpretation of IR spectra.

File type included:
• Editable PowerPoint (.pptx)

Last updated: 2026 – improved clarity of spectral interpretation, added additional worked examples, and enhanced practice questions aligned to IB HL assessment objectives.

Get this resource as part of a bundle and save up to 33%

A bundle is a package of resources grouped together to teach a particular topic, or a series of lessons, in one place.

Bundle

BUNDLE S3.2 Functional Groups: Classification of Organic Compounds, SL & HL (IBDP Chemistry)

This bundle of PowerPoints covers S3.2 Functional groups: Classification of organic compounds for IBDP Chemistry (first examination 2025), including naming, isomerism and analytical techniques. It provides a complete, structured sequence of lessons to build students’ understanding of organic chemistry from foundational concepts through to HL analysis skills. Functional groups are specific groups of atoms within organic molecules that determine their chemical properties and reactions. By identifying functional groups, chemists can classify compounds, predict reactivity and systematically name molecules. This bundle supports students in developing these essential skills, progressing from basic formula types through to spectroscopy and structural determination. This fully editable bundle includes 12 PowerPoint (.pptx) lessons, carefully sequenced to support both SL and HL teaching. Early lessons focus on foundational knowledge such as types of formula, homologous series and nomenclature, before progressing into structural and stereoisomerism. The later lessons develop higher-level analytical skills, including mass spectrometry, IR spectroscopy, ¹H NMR and combining techniques to identify unknown compounds. The bundle includes: • Lesson 1: Types of Formula • Lesson 2: Functional Groups • Lesson 3: Homologous Series • Lesson 4–5: Nomenclature (straight-chain and branched-chain) • Lesson 6: Structural Isomerism • Lesson 7–8 (HL): Stereoisomerism (cis–trans and optical) • Lesson 9–12 (HL): Mass spectrometry, IR spectroscopy, ¹H NMR and combining analytical techniques Across the lessons, you will find: • Retrieval starter activities and clear key definitions • Step-by-step explanations and worked examples • Visual representations of structures and isomers • Links between structure, bonding and analytical data • Practice questions with answers for consolidation This bundle is ideal for teaching the full S3.2 topic or for structured revision, helping students build confidence in organic chemistry and prepare effectively for IB exam questions. File types included: • 12 editable PowerPoint (.pptx) files Last updated: 2026 – improved lesson sequencing, added HL analytical content, and enhanced practice questions aligned to IB assessment objectives.

£16.00

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