Qualitative tests for organic functional groups - practical video | 16-18 years
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- Опубликовано: 9 июл 2024
- Find supporting resources including pause-and-think questions, technician notes, worksheets, and more at 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 rsc.li/2XfPWe5
And for 14-16 year olds at rsc.li/36XHfXi 
Наука
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Wow it's amazing especially using the systmatic method thank you.
Glad it was helpful!
This is a really good video. Lots of tests that are new to me, I think I'll return to this video.
Great that you found this video useful - did you find the supporting resources at rsc.li/3hmgvVM? You can register and access for free.
I love this! Please consider describing each of the reagents (like 2,4-dinitrophenylhydrazine) and how they react with the various functional groups.
Thank you for your comment, glad you like the video. You will find some more information about the reactions taking place in the supporting resources for this video found here rsc.li/3hmgvVM. For more resources on the topic see here edu.rsc.org/searchresults?parametrics=&qkeyword=organic+functional+groups
Nice experiments!
It's amazing sir it is helpful video for testing the functional group detection 😊😊😊Thanks sir😍😍😍😍
It's good to hear you found this video useful - did you find the supporting resources at rsc.li/3hmgvVM? You can register and access for free.
I subscribe to your channel it is so good✨✨ and to be honest, you deserve more
Tnx...very useful 👏👏👏
It's amazing video
Really this is a good video sir..... This helped me a lot..
So glad you found this video useful - did you find the supporting resources at rsc.li/3hmgvVM? You can register and access for free.
For halogenoalkane arent we going to use ethanol dissolves sodium hydroxide instead of only ethanol
I make in radical reaction mechanism organic chemistry 212
Should the ketone have caused a colour change in bromine water also? As it contains an unsaturated carbon bond.
C=O is stronger than C=C and therefore doesn't react with Bromine water.
In organic chemistry, only Carbon to carbon bonds are considered when determining if a compound is saturated.
♥️
What about amines?
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🥰🙏🏻❤
We have lots of career videos, including information about salary and routes through study on our dedicated careers site here edu.rsc.org/future-in-chemistry. All the best for a future career in science.
💙💙💙
May I come in London
I wish I was a scientist
Everyone can be a scientist! As long as you observe the world around, ask questions and test the answers. :D
Pls given answer
Hello - if you have a query please contact us at this email address for an answer EDUCATION@rsc.org. Best wishes.
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Hello - if you have a query please contact us at this email address for an answer EDUCATION@rsc.org. Best wishes.