Identifying Alkenes with Bromine Water

Ask any questions in the comments!
Disclaimer:
This must be performed outside or in a fume hood. If it is done outside, you must where a respirator to protect yourself from the bromine. You also need to where gloves and goggles at all times.

[jcjlf]

If the left test tube contains an alkane, there is no mixing either. The bromine water forms two layers (hardly visible), with bromine dissolved in the upper alkane layer as well. If you would have shaken the left t.t. you would have noticed that most of the bromine prefers the alkane as a solvent (both non-polar).

[skiphoffenflaven]

The bromine atoms add to the carbons in the double bond, they don’t “replace itself”. A vicinal dibromide forms. But most likely a bromohydrin forms due to water being the solvent and thus the nucleophile in higher concentration (sorry, my phone died while I was typing this comment, and it still posted. I forgot I was typing it once that happened until someone liked my comment).

[eronschulte]

whose here because there orgo lab is making them watch these videos?

[cafevid]

C6H14(l) + Br2(l) -> Doesn't act
C6H12(l) + Br2(l) -> C6H12Br2(l)
Br2 is a red liquid but C6H12Br2 is a colorless liquid.
Thanks a lot

[WombatsRuleDaWorld]

Thankyou so much! My chemistry teacher's shit and this was very helpful.

[nhungoc-d]

since there are two layers in the alkene reaction with bromine, i wonder whether the water is the layer above or under the products of the reaction?

[Rebbie]

I always did this lab but now due to online teaching your video is our help Thank you

[Tim-vu]

why is this experiment banned at schools in my area?

[kathyss]

May I know what materials are exactly needed for this experiment? I would appreciate it...

[idontliketomatos]

For alkynes ?? Is it d same as alkene ??? Cozzz it's a triple bond which can get replaced??? Is dat right

[nathanmarshall]

Yep! I used turpentine (mainly pinene) as the alkene like they recommended.

[ppkukimiaipb]

Hey.. this is cool.. I am gonna use your video for lab presentation. Thanks a lot :)

[ابوحمادة-قن]

Does heptane change the color of the black oil?

[visix]

the first is just water because if it was an alkane the bromine water don't mix

[bienalexeigalming]

what happens when exposed to sunlight?

[haydenphillips]

what is the traslucent layer above the haloalkane in the middle test tube?

[nathanmarshall]

Thank you! Your videos are always interesting too!

[mrkslva]

Not gonna explain it?, you just did..

[browsing]

when bromine was added to alkane, do you mean NO reaction occur at all?or is it occur at very minimum amount? coz how should halogenation of alkane be explained?i'm baffled.thx a lot if u can explain this

[lukaseriksson]

I saw you posting about this on sciencemadness!