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

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

[extrememinihatake]

Wow it's amazing especially using the systmatic method thank you.

[davidtownsend]

This is a really good video. Lots of tests that are new to me, I think I'll return to this video.

[kenbrady]

I love this! Please consider describing each of the reagents (like 2, 4-dinitrophenylhydrazine) and how they react with the various functional groups.

[shahzaimshahzaim]

It's amazing sir it is helpful video for testing the functional group detection 😊😊😊Thanks sir😍😍😍😍

[AsadKhan-buks]

For halogenoalkane arent we going to use ethanol dissolves sodium hydroxide instead of only ethanol

[poornachandar]

Really this is a good video This helped me a lot..

[meditationrelaxationmusic]

I subscribe to your channel it is so good✨✨ and to be honest, you deserve more

[NullyBird]

How can you differentiate between a primary or secondary alcohol?

[mattiejobson]

Should the ketone have caused a colour change in bromine water also? As it contains an unsaturated carbon bond.

[girjabaghel]

I make in radical reaction mechanism organic chemistry 212

[siri_]

I am currently studying in class 12
and started loving chemistry from 10th class😍😍😍
I have decided to do my graduation in chemistry
But my family members and teachers demotivating me🥺that there is less career in chemistry 😢can you make a video about careers in chemistry

I'm very much interested to know more and more about chemistry 😍
Loved this video❤️😍
Keep making videos like this😍❤️



Love from India🥰🙏🏻❤

[arunavadasgupta]

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