Qualitative tests for organic functional groups – practical video | 16–18 years скачать в хорошем качестве

Qualitative tests for organic functional groups – practical video | 16–18 years

Find supporting resources including pause-and-think questions, technician notes, worksheets, and more at https://rsc.li/3hmgvVM Provide a context in which learners can plan a sequence of tests – the less the better! – to identify a set of unlabelled organic compounds. Qualitative tests of organic functional groups appear in all 16–18 courses. It is not enough to just be able to recall how to carry out each test. This experiment requires a solid understanding of the tests and a logical approach to deduce the identities through positive/negative results and a process of elimination. Chapter titles 00:00 Opening 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 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 Discover videos for more core practicals for 16–18 year olds at https://rsc.li/2XfPWe5 And for 14–16 year olds at https://rsc.li/36XHfXi