Qualitative tests for organic functional groups | practical videos | 16–18 students

Test tubes marked A to F in a blue test tube holder; each one contains some clear liquid and is sealed with a bung

Video and supporting resources to support a practical investigation to identify organic functional groups using a range of qualitative tests.

Apply a range of qualitative tests to identify organic functional groups in a set of unknown samples for learners on A-level and equivalent 16–18 courses. Additional resources include pause-and-think questions with answers, teacher notes, technician notes, intended outcomes and a follow-up worksheet.

Chapter titles: 00:10 Introduction to the investigation; 02:04 Test for carboxylic acid by adding a few drops of sodium hydrogen carbonate solution to each sample; 03:35 Test for an unsaturated hydrocarbon by adding 1 cm3 of bromine water to each sample; 05:26 Test for haloalkanes with ethanol and silver nitrate solution; 07:40 Test for alcohols with acidified potassium dichromate solution, microscale; 09:49 Test for carbonyl groups with Brady’s reagent (a solution of dinitrophenylhydrazine (2,4-DNPH)), microscale; 12:07 Test for aldehydes using Tollens’ reagent.

Sign in now to access this content.

A man wearing glasses sits at a table using a laptop. The image is surrounded by a colourful border.

Sign in to your account to view this content

If you’re not already registered, sign up today. It’s free, and will allow you to access our full range of education resources and support.