What if you re-acidify the phenolphalein. How would it go back to its original structure? Wouldn't you get an alcohol on the O- and end up with a carboxylic acid on the COO-? Then it would still be pink.
basically possible and it will also happen. But only in equilibrium with the formation of H2O. Remember that this is an effect in the absence of H ions. So either H2O or OH/COOH but not both simultaneously. And I'd guess that because OH- ions are just smaller they get H+ more easily than the sterically hindered phenolphthalein.
When you say, "sp3 has no p-orbital, and sp2 has a p-orbital" Do you mean sp3 has no pi bonds and sp2 has one pi bond? I thought sp3 has 3 p-orbitals and sp2 has 2 p-orbitals. Did you mean to say pi bond instead of p-orbital?
+danielle lebouthillier i think what he meant was that sp3 does not have any unhybridized p atomic orbitals to form pi bonds while sp2 has 1 unhybridized p orbital and can form a pi bond
Ok, So i understand the concept of absorbing a specific wavelength of light, but hwo do we get it reflecting a different wavelength? Is there another formula that dictates what wavelength is emitted from a molecule based on what that molecule absorbs? Thanks!
This might be a bit late, but as far as i understood it: If a material is lets say red, then every wavelength is absorbed by this material, EXCEPT red/reddish wavelengths which are reflected into your eye. Can anyone verify this?
@@Nicolas-eo7lo Not quite, lets see a molecule absorbs red wavelength of light. The light reflected will be the complementary colour according to the colour wheel, in the case of red light being absorbed the complementary colour is green and so the compound wil be green coloured. Hope this helps
When a compound is subjected to electromagnetic radiation why cant it absorbs all radiations like microwave , ir, and uv and emits light in visible region?
I've now known the effect of phenolphthalein for 10 years and never heard of that mechanism before. THIS IS SO COOL! :D
This video changed my outlook on life❤
This was the best explanation i have ever seen i my life!
really liked these transitions. no homo
wow this was a great video... Even i as a high schooler with only basic knowlegde get it now
this helped so much, thank you!
wonderful explanation thank you!
Omg thank you so much DX
I finally understood this topic
THIS IS EXPLAINED SO WELL OH MY GOD WHY CAN'T YOU BE MY CHEM TEACHER
VERY VERY NICE VIDEO..THANKS A LOT
good video, but i dont get which of the videos about this topic is the first one i should watch!!!!
Thanks for the explanation
I love you.. You always help me a lot.. 😭😭
Great explanation, great teacher!
Why does the energy difference between the HOMO and LUMO decrease though? (other than that you've drawn them closer together)
I want answer of this one ,,,I have same doubt ✌️
thanks so much
Wowwww✌️
thanks for the help! (y)
What if you re-acidify the phenolphalein. How would it go back to its original structure? Wouldn't you get an alcohol on the O- and end up with a carboxylic acid on the COO-? Then it would still be pink.
basically possible and it will also happen. But only in equilibrium with the formation of H2O. Remember that this is an effect in the absence of H ions. So either H2O or OH/COOH but not both simultaneously. And I'd guess that because OH- ions are just smaller they get H+ more easily than the sterically hindered phenolphthalein.
Why is the reduced form of DCPIP colorless but the DCPIP blue?
Sir app kis app se videos bnte ho
When you say, "sp3 has no p-orbital, and sp2 has a p-orbital" Do you mean sp3 has no pi bonds and sp2 has one pi bond?
I thought sp3 has 3 p-orbitals and sp2 has 2 p-orbitals. Did you mean to say pi bond instead of p-orbital?
+danielle lebouthillier i think what he meant was that sp3 does not have any unhybridized p atomic orbitals to form pi bonds while sp2 has 1 unhybridized p orbital and can form a pi bond
hi
Wait why are we focusing on only the pi bonds? Why not sigma bonds?
Ok, So i understand the concept of absorbing a specific wavelength of light, but hwo do we get it reflecting a different wavelength? Is there another formula that dictates what wavelength is emitted from a molecule based on what that molecule absorbs?
Thanks!
This might be a bit late, but as far as i understood it: If a material is lets say red, then every wavelength is absorbed by this material, EXCEPT red/reddish wavelengths which are reflected into your eye. Can anyone verify this?
@@Nicolas-eo7lo Not quite, lets see a molecule absorbs red wavelength of light. The light reflected will be the complementary colour according to the colour wheel, in the case of red light being absorbed the complementary colour is green and so the compound wil be green coloured.
Hope this helps
The volume is very low
why is the energy difference smaller ?
When a compound is subjected to electromagnetic radiation why cant it absorbs all radiations like microwave , ir, and uv and emits light in visible region?
Sound is very feeble in this video.
0:03 wrong. wtf r you talking about?
can anyone tell me how spectroscopy is used in real life? I don't get this subject :(
Spectroscopy is used to identify molecules by looking at their absorption spectra.