in reply - I have started teaching A level chemistry this year at an independent school in England :) Your videos not only help the students but also me - always nice to hear from another perspective especially when so well and simply (like as in genius) put.
@MaChemGuy9 жыл бұрын
Brian Ducille That's very kind of you to say so Brian. It's great to hear that the videos are helping fellow teachers as well as students. I'll be making more next year for the new specification so keep watching. Thanks again :)
@juliuskageni30182 жыл бұрын
This is the most helpful GC video I have seen. Thanks with the great work!
@sonilzaki9 жыл бұрын
I can't thank you enough :)
@MaChemGuy9 жыл бұрын
Sonil Zaki You did with your positive comment :)
@TheMusicalSandy8 жыл бұрын
Your video has really helped me! I struggle with chemistry but you just taught it so well, i understand it all. Thank you so much! :)
@MaChemGuy8 жыл бұрын
Very kind of you to say so. Glad the videos help!
@hbains939 жыл бұрын
Hi, thanks for all the videos you have posted for A2 chemistry. its good to see how you post all these videos just to help students like my self it is much appreciated!
@jcftsgjc7 жыл бұрын
What a hero you are
@the4ducilles9 жыл бұрын
Hi there MaChemGuy - you have asked for feedback on your videos. Well they are a great support to me in class. We use them in conjunction with Cornell's note taking system to record pertinent facts and your explanations are very clear. So thank you for posting your videos which are proving a valued tool for me to use in class.+
@MaChemGuy9 жыл бұрын
Brian Ducille Hi Brian, many thanks for your feedback. I'm glad you have found the videos useful. Can I just ask I what capacity do you use them? Are you a teacher by any chance? If so, do you work in a UK school and teach A level Chemistry? I'm compiling a report for my Principal as to the impact of the videos and your answers to these questions would be very helpful. Thanks in advance.
@lumarlucena13197 жыл бұрын
Very clearly explanation. Thank you so much.
@MaChemGuy7 жыл бұрын
Lumar Lucena You're welcome. Thank YOU very much
@MoneyQuo8 жыл бұрын
these videos helped me a lot to understand gc thoroughly. thnx for valuable videos
@aminalhaq237 жыл бұрын
This is an absolutely amazing video. Keep up the great work!
@MaChemGuy7 жыл бұрын
Mustafa Aminalhaq Thanks for that. Glad you think so
@ASHISHSINGH-zp6tq11 ай бұрын
@@MaChemGuy sir this is such a great, top tier video, thank you. 🤩
@ilovechristmas969 жыл бұрын
Thank you soo much, I actually understand GC now!! :D
@selvaduronay89102 жыл бұрын
thank you so much for this video i have been struggling for a while with organic chemistry it really helped
@MaChemGuy2 жыл бұрын
Chuffed it helped you. Thanks for letting me know 😊
@samuellombardo33337 жыл бұрын
Very straightforward with all essential info. Thanks!
@disneychannel2012969 жыл бұрын
Thank you so much for all your videos!!! You're a star!
@sadieb275 жыл бұрын
frkn life saver tysm x
@tjravend3 жыл бұрын
once again everytime i struggle with chem you save my butt
@MaChemGuy3 жыл бұрын
Glad I’m able to help
@fishermansdiary8 жыл бұрын
Great video, very simply explained. Cheers mate!
@morgann42766 жыл бұрын
Tysm sir!! You teach so well!! 😊✌
@eirinyagokoro87477 жыл бұрын
my exam is in 45 minutes. thank you
@sadieb275 жыл бұрын
how'd it go
@mostaphamassaee34795 жыл бұрын
Thaaanks! this is the best explanation.
@petrichor71277 жыл бұрын
This is very helpful!! I can't thank you enough too :)
@layalhammoud45687 жыл бұрын
thank you very much for this video it is well explained and benefits me a lot....
@maelsandaliwa87368 жыл бұрын
great to quickly remind myself
@AC-pk1co8 жыл бұрын
If HOCH2CH2OH forms the most hydrogen bonds, surely it dissolves in the stationary phase easier? So has a longer retention time than CH3OH? There's obviously a problem in my thinking, any help would be much appreciated
@MaChemGuy8 жыл бұрын
The SP in the question was a liquid alkane and so non polar. Interactions will therefore be via van der Waals forces not H-bonds. The more H-bonding potential, the less interaction and so shorter RT. If the SP had been polar however, it would have had the longest RT. It all depends on the nature of the SP
@Sara-sx1iv9 жыл бұрын
so helpful, thank you!
@aliraja76109 жыл бұрын
Thank you very much, these videos are very helpful
@jwmc92638 жыл бұрын
Hello, great video but can you please tell me how 'forming hydrogen bonds is kind of the opposite mechanism to dissolving to van der waals forces? Thank you!
@MaChemGuy8 жыл бұрын
For a substance to dissolve in another substance they need to be able to interact with each other. Polar molecules dissolve each other by dipole dipole or hydrogen bond interactions and non polar by van der Waals interactions. Just remember 'like dissolves like'
@firminobecker74005 жыл бұрын
I finished the spec quite some time ago thanks to your videos. The only topic I’ve attempted quite a few times and still not fully understood is chromotography I’ve watched your videos, read the books but I just can’t seem to get my head around it . I’ve attempted Questions papers on it but I find myself memorising answers rather than actually understanding what’s going on is there anything you could recommend that I do ?
@MaChemGuy5 жыл бұрын
Firmino Becker Where does it break down for you. I’ll try and explain it in a different way for you
@missaleksandrinka8 жыл бұрын
Hey would you be able to explain about polar and non-polar compounds interacting with the stationary phase? Thank you.
@MaChemGuy8 жыл бұрын
Have you come across the 'like dissolves like' phrase for solubility? Non-polar molecules dissolve/interact with the non-polar stationary phase by forming van-der Waals forces with it. Polar molecules can't do that as they interact by forming hydrogen bonds. Does that help?
@MaChemGuy8 жыл бұрын
Forgot to say that the greater the interaction the longer it takes for the molecule to travel through the column
@missaleksandrinka8 жыл бұрын
+MaChemGuy So non-polar molecules will be slowed down the most? Thank you so much! I watch your videos on a daily basis :)
@MaChemGuy8 жыл бұрын
+Alexxx Exactly! And if the stationary phase was polar, it would be the other way round. Glad you find them helpful :)
@sabahabas45117 жыл бұрын
Alexxx hi
@ericwanjiru88666 жыл бұрын
well explained.
@michaelanthonyhalljr19708 жыл бұрын
Great vid thanks!
@rubaetm53533 жыл бұрын
Thank you.
@lucyball65737 жыл бұрын
I don't understand why longer chain alcohols (also dialchohols) have less interactions because this is the opposite of normal solubility of alcohols????
@tylermitchell1856 жыл бұрын
i myself dont know why, but it may change the factor of which affects interactivity when it is a longer chain.
@tylermitchell1856 жыл бұрын
with the stationary phase, that is
@yumnabarhamji17006 ай бұрын
Thankyou !!!
@hanayahiacherif28457 жыл бұрын
Thank you so much 🙇
@darkmoon36466 жыл бұрын
Im a bit confused here sir....i don’t get why c5h12 is more soluble when it can only form van der wal forces.Whereas the alcohol forms hydrogen bond which is the strongest.So wouldn’t alcohol be more soluble in the last example and travel the least
@MaChemGuy6 жыл бұрын
Day dreamer Xxx The stationary phase isn’t water, it’s a liquid alkane. Like dissolves like so the alkane will dissolve best into it due to its ability to form vdw with it. The alcohol will interact the least as it can’t form H bonds with an alkane
@cutieepie7577 жыл бұрын
wow Thankyou soo much this video is soo helpful.
@MaChemGuy7 жыл бұрын
cutiee pie Glad you liked it and thanks!
@shanguaih85489 жыл бұрын
Beautiful like always :)
@aligrundy8129 жыл бұрын
Why when hydrogen bonds are formed does it interact less? Since hydrogen bonds are stronger
@tozzard06079 жыл бұрын
Alastair Grundy When he says they form hydrogen bonds, he means between molecules of themselves, not between the alcohols and the stationary phase. The liquid stationary phase (say a long chain alkane) is not capable of hydrogen bonding, so cannot effectively dissolve the alcohols. Remember 'Like dissolves like'. In this case, it's not so much about the strength of the different interactions but whether or not they are present. If the stationary phase was a substance capable of hydrogen bonding then the order would reverse.
@maelsandaliwa87368 жыл бұрын
Thank you
@faizhasnain65755 жыл бұрын
pattern gang
@aasthaaggarwal3486 жыл бұрын
Sir, why unknown substances don't have retention time?
@arus2han3 жыл бұрын
this is cool
@Rhysoawsome7 жыл бұрын
top bloke
@shlb36928 жыл бұрын
thank you for vidio
@jattytakeover70995 жыл бұрын
This is good but I need the method for it and so far no website has found it any suggestions?