This video (and part 1 ) is just fantastic. Simple and clear explanations without dumbing anything down. Clear language. Neat and tidy visuals. Step by step, not wasting any time. Extremely time efficient, without seeming hurried at all. Most chemistry videos with tens/hundreds of thousands of views are bloated messes compared to this.
Thanks heaps! This is one of the most wholesome and loveliest comments I've read and I really appreciate the time you took to write this; it was the first thing I saw this morning and now at night it has honestly been the highlight of the day :)
I really appreciate the concise content. This sort of material could be useful as long term educational material which really says something in my mind. Great work.
QUESTION..........Why did you use an abundance of acid instead of an abundance of alcohol?????? Was there a reason or was it just an arbitrary choice???????
Hi! I used an abundance of acid to make sure I could react all of the alcohol. This means that, at the end, there is some left over acid which is easy to get rid of with a carbonate solution (just keep adding carbonate until the fizzing stops, then drain it off because it is in the polar layer while the ester remains in the non polar layer). If I had used an abundance of alcohol then at the end of the reaction there would be extra alcohol left over, and to get rid of the extra alcohol might be harder because one of the only options is to go straight to distillation.
@@sciencescribe ........... Thanks. IS IT HARDER TO make an ester with a secondary alcohol like isopropanol than it is using a primary alcohol like methanol and ethanol?????????????????? I am finishing up on my 3rd attempt right now trying to make isopropyl benzoate. The first attempt i only added 2 mL of H2SO4 instead of the stoichiometric amount. I added a LOT of extra isopropanol and then refluxed for 30 min and then distilled out most of the isopropanol azeotrope to get rid of the water which took 60 min. So total reflux was 90 min. But i think since i added so LITTLE H2SO4 the reaction time was so much SLOWER than it normally would be that i did not make much ester or water to distill out in an azeotrope. So the next time i used a stoichiometric amount of H2SO4 and just added XS alcohol but did not distill it out. I just figured i would get the alcohol out in my water/dcm washings (ran out of ether) after the reaction was done. It still did not work. Each time i only got a mL or 2 of ester. For those 2 attempts i was using SATURATED Na2CO3 solution that was in my fridge (4C) to neutralize the acid after each reaction. So for this last attempt i went ALL OUT. Like in every case i added 25mL of alcohol to do the react. And 75mL as my XS. But this time just like the first attempt i added in 75mL on top of that to distill out at the end and get the 6 mL of water out of the pot to shift the equilibrium. ALSO i added a stoichiometric amount of H2SO4. Also i added 6g of anhydrous MgSO4 to soak up the 6g of water made in the reaction. Then on top of all that i refluxed for TEN HOURS and that includes distillation time getting the alcohol/water azeotrope out of the pot. ALSO for my neutralization i used 10% Na2CO3 instead of SATURATED Na2CO3. Sorry this is so long but if you made it this far please tell me why after all that and i still only got like 30mL in my flask and by the time i do a vacuum distillation it will be down to 20 or 25 mL for a 53.66 theoretical yield reaction??????????? I mean WHAT THE HECK??????????????? If it is TRUELY an equilibrium reaction then why did i not get a 100% or at least an 80 or 90%??????????? I mean i refluxed TEN HOURS. I only made 6 mL of water in the reaction and i had the isopropanol azeotrope get rid of 6 mL and the MgSO4 get rid of 6mL and the H2SO4 sequester probably another 3 mL at least. I should get a better yield than 40 to 50% right????? I do not see what else i could do to get this reaction to go better. If you use acid anhydride will you get an 80 or 90% yield or is it just as crappy as esterification?????????
Thank you for creating such clear and concise information! Your demonstration was very well done as well! This video (as well as part 1) was really helpful! ❤🙏
This video (and part 1 ) is just fantastic. Simple and clear explanations without dumbing anything down. Clear language. Neat and tidy visuals. Step by step, not wasting any time. Extremely time efficient, without seeming hurried at all. Most chemistry videos with tens/hundreds of thousands of views are bloated messes compared to this.
Thanks heaps! This is one of the most wholesome and loveliest comments I've read and I really appreciate the time you took to write this; it was the first thing I saw this morning and now at night it has honestly been the highlight of the day :)
I really appreciate the concise content. This sort of material could be useful as long term educational material which really says something in my mind. Great work.
Once again, special thanks to Kuranui College for use of their heating plate as well as reagents! :)
hey Mr soh! remember me? I cut my finger with a scalpel a couple of weeks ago. guess who I am...
Absolute legend! I have my L3 chem exam tomorrow and this helped clear some things up!
Good luck Charlotte! All the best to you and your classmates, and I wish you all well for your future studies and endeavours.
Thank you that helped me to consolidate the experiment from my chemistry lesson
Thank-you for the kind words :)
You are an absolute life saver :)
QUESTION..........Why did you use an abundance of acid instead of an abundance of alcohol?????? Was there a reason or was it just an arbitrary choice???????
Hi! I used an abundance of acid to make sure I could react all of the alcohol. This means that, at the end, there is some left over acid which is easy to get rid of with a carbonate solution (just keep adding carbonate until the fizzing stops, then drain it off because it is in the polar layer while the ester remains in the non polar layer).
If I had used an abundance of alcohol then at the end of the reaction there would be extra alcohol left over, and to get rid of the extra alcohol might be harder because one of the only options is to go straight to distillation.
@@sciencescribe ........... Thanks. IS IT HARDER TO make an ester with a secondary alcohol like isopropanol than it is using a primary alcohol like methanol and ethanol?????????????????? I am finishing up on my 3rd attempt right now trying to make isopropyl benzoate. The first attempt i only added 2 mL of H2SO4 instead of the stoichiometric amount. I added a LOT of extra isopropanol and then refluxed for 30 min and then distilled out most of the isopropanol azeotrope to get rid of the water which took 60 min. So total reflux was 90 min. But i think since i added so LITTLE H2SO4 the reaction time was so much SLOWER than it normally would be that i did not make much ester or water to distill out in an azeotrope. So the next time i used a stoichiometric amount of H2SO4 and just added XS alcohol but did not distill it out. I just figured i would get the alcohol out in my water/dcm washings (ran out of ether) after the reaction was done. It still did not work. Each time i only got a mL or 2 of ester. For those 2 attempts i was using SATURATED Na2CO3 solution that was in my fridge (4C) to neutralize the acid after each reaction.
So for this last attempt i went ALL OUT. Like in every case i added 25mL of alcohol to do the react. And 75mL as my XS. But this time just like the first attempt i added in 75mL on top of that to distill out at the end and get the 6 mL of water out of the pot to shift the equilibrium. ALSO i added a stoichiometric amount of H2SO4. Also i added 6g of anhydrous MgSO4 to soak up the 6g of water made in the reaction. Then on top of all that i refluxed for TEN HOURS and that includes distillation time getting the alcohol/water azeotrope out of the pot. ALSO for my neutralization i used 10% Na2CO3 instead of SATURATED Na2CO3.
Sorry this is so long but if you made it this far please tell me why after all that and i still only got like 30mL in my flask and by the time i do a vacuum distillation it will be down to 20 or 25 mL for a 53.66 theoretical yield reaction??????????? I mean WHAT THE HECK??????????????? If it is TRUELY an equilibrium reaction then why did i not get a 100% or at least an 80 or 90%??????????? I mean i refluxed TEN HOURS. I only made 6 mL of water in the reaction and i had the isopropanol azeotrope get rid of 6 mL and the MgSO4 get rid of 6mL and the H2SO4 sequester probably another 3 mL at least. I should get a better yield than 40 to 50% right????? I do not see what else i could do to get this reaction to go better. If you use acid anhydride will you get an 80 or 90% yield or is it just as crappy as esterification?????????
great demo
Thank you for creating such clear and concise information! Your demonstration was very well done as well! This video (as well as part 1) was really helpful! ❤🙏
Thank you so mcuh!
Thank u
sangat mantul
Love U so Much 😊
Is this the purest it can get?
Hello sir, can you please suggest me the synthesis of butyl cyanoacetate
Awesome video but make sure to use the correct PPE.
hahaha lol! nice one dude! sick video btw