this saved my life! my chemistry teacher is Scottish - none of us can understand her, and she rushes through everything and hates us asking questions. So this is so much nicer; as you explain everything without unneeded information.
Without your help i really don't think i would have stood a chance at passing my exam but you explain everything so well and in a way thats easy to understand. Thank you so much.
Thank you so much for uploading these videos I didn't understand anything in chemistry until I started watching your videos, you are so good at making concepts in chemistry that were difficult for me to understand into something very easy. I really wish you were my class teacher unfortunately I a stuck with a teacher who was an Oxford graduate ,who can't seem to let those Oxford glory days go... like if you have a teacher similar to this : someone who just likes knowing they are smarter than the whole class and constantly making sarcastic comments and when the whole 2 chemistry classes do terribly multiple times not being able to realise she is the problem.
Thank you so much Eliot, this is so helpful. I try to understand it in the CGP guide but sometimes it sinks in so much easier when you're shown examples. Absolutely massive help. I hope to see more Chemistry videos 😊
Hi, I spotted a mistake when talking about the ez higher priority elements, it's the atomic number you need to take into consideration not the mass number of the element.
Your videos are really helpful and I understand each topic 10x better. Could you please make a video on structural isomerism especially explaining the chain, positional and functional group isomers?
17:05 - Is it determined by the highest atomic number or highest mass number? Chemguide says Atomic number but will looking at highest mass number be OK also?
At 17:07 the top carbon is attached to three H atoms (total Ar=3) and the bottom carbon is attached to two H and one carbon (total Ar=14) is that why the bottom has the highest priority?
Hi, i love your channel and you helped me get an A in chemistry AS, this year, i was just wondering when you would finish the Chem 4 and 5 units now im in A2, i appreciate that your busy, but i would really like it if you uploaded the remaining videos as they are such a great help.
Thank you very much, this video was incredibly helpful! you have managed to make this really simple to understand. I'm curious about your two dislikes though, i guess its just some people doing it deliberately. We'll never understand those people on this site. Thanks again! =)
I'm late but for the last question, isn't there two of the same groups?? CIP system isn't needed?? So off the two carbons on the double bond, one has hydrogen and CH3, the other has CH3 and C2H5. Each has two different groups, so this is Z isomer, as the same CH3 groups are on the same side..? So the correct answer would be if CH3 was in the opposite side?
What is the two substituents with the highest atomic number were on the same carbon? Do you still find the group on each carbon with the highest atomic number or would it not be a stereoisomerism.
+Mubs S You need to look at priority on each side of the molecule, hence me saying to think of them as left and right. BUT, the actual EZ notation comes from looking at where the highest priorities lie, hence me talking about looking at it horizontally!
+Mubs S You need to look at priority on each side of the molecule, hence me saying to think of them as left and right. BUT, the actual EZ notation comes from looking at where the highest priorities lie, hence me talking about looking at it horizontally!
why does But-2-ene have e-z isomerism because i thought that the CH3 was part of the chain and so not classed as a separate group? I have my exam tomorrow and I'm really confused about isomerism!!
sorry if this is too late. When you're drawing E/Z isomers you just draw the double bond out fully. Then the structural formula for either side of the double bond. So if the CH3s are both on the top/on the bottom its Z, if theyre diagonal to each other its E :)
What Jasmine said! The alkyl groups ARE part of the chain and they are named as such. However, it is their attachment to the C=C that governs E or Z isomerism.
+My112 Y Yeah, definitely. All my kids are still on the old A2 so I want them to have the videos. Plus, they are almost all going to remain when the new spec comes into play for the full A-Level!
My exam is tomorrow but I have an urgent question - with E/Z isomers, will they have the same repeating unit in a polymer? Or the same polymer? Thanks for the videos by the way! Lifesaver
thanks for the video I really understand it now but I've got a question; Can you have E-Z isomerism in pentene when there is a methyl group on one side and 2 methyl groups on the other?
+Tanzeel Ahmed Hashmi I'm not sure that what you have described would be pentene... Do you mean methylbutene? Either way, in a situation where you have one methyl on one side (with a hydrogen atom also attached to the carbon of the double bond) and then two methyl groups attached to the other carbon atom, you cannot have E-Z isomerism. No matter how you switch the groups around, the molecule will always be the same. You get me?
i dont understand the last question because it says to draw an E isomer but hasnt he drawn a Z isomer since the same groups are on the same side (CH3). someone please explain im confused??
Eric, can you reply me with a place for purely organic chemistry past paper questions if you know of any? Had a mock today - Got 34/78.... Been watching your videos and I just cannot believe the difficulty of my AS-Level test today. The polymer section, the mechanisms of Alcohols as well... Even simple parts like naming compounds but the problem was that, they were in the format of say, CH3CH2(CH3)2CCH???... etc which confused me
Shouldn't you be considering the atomic number not the atomic mass when assigning C.I.P priority ? Although it doesn't make a difference when working out the form of isomerism as long as your consistent but when attempting written answers you shouldn't mention relative atomic mass you should mention assigning property via atomic number.
+E Rontoul so have you covered the new spec for this years 1st year a level students? and these videos are great for first time understandings 👍 good work
i just started chem alevels and have a teacher who is exceptionally bad at teaching. (been taught by her since y7 now. hasnt got any better) its taken my teacher 2 lessons to teach less than what you taught me in a 30min video thanks gonna show my class ur videos
your videos are really good. I wanted to ask how you actually write that stuff and what screen cast ( if you use on) you use and how you get to write so clearly. try specifiy the detail pls?. thnk you
+NirajC72 This is a cracking question. First off, units 4 and 5 will be there, as the June 2016 series will be the last so that's not an issue. But, there is a potential problem with resitting the AS units as by that point, there will be a new specification. I think that AQA will make another paper each for Units 1 and 2 for those who wish to resit...
As far as I'm aware, pi bonds aren't officially in the specification. Have a look at this page for a little more help: www.chemguide.co.uk/atoms/bonding/doublebonds.html
hi, soooooo I take chemistry in AS levels and I took it in IG ,but I got a C in IG , ive always faced problems with chemistry through out the years , do you know what I can do about it or anything I should do to get a better grade before my AS exams reach, I did my pre mocks and mocks and got U and E as my grades , it would be really amazing if any one can help me with this problem ASAP
I don't know whether this would a much of help but, just do practice papers, like a lot. Check for the mistakes u do again and again and check online resources. Even while watching these videos, write a summary in a way that u would be able to revise later. Plus, good luck!
I think the only think missing was Alkene + KMnO4 (cold/dilute--> ketone, hot/conc--> aldhehyde--> carboxylic acid).. please add that if you can, would help a lot of us
Open the Doors Like A Tesla Jericho walls we a wrestler Open the Doors Like A Tesla Like A Tesla (ayyy) Yeah we know I’m about to go autopilot with my psilocybin flow Yeah the kids back out from syntax used to hate myself When to the forest then I woke myself Up!
This dude saving students six years after posting 🖐️
Bless you. As in for your sneeze and your soul for saving so many of our grades
just read this as he sneezed
tu kurdiiii
I remember it as (Z)ame and opposti(E)
z, zhe zame zide.
@@mattharris1930 ze zameeeeee zideeeeeeee
Legend
eposite
Thanks
mum- 'i think you actually like revising'
me- 'i like revising for chemistry... only because of this E.Rintoul guy'
this saved my life! my chemistry teacher is Scottish - none of us can understand her, and she rushes through everything and hates us asking questions. So this is so much nicer; as you explain everything without unneeded information.
really helpful. you made A level chemistry so simple to do
+KELVIN Opoku Forkuo Excellent :)
Without your help i really don't think i would have stood a chance at passing my exam but you explain everything so well and in a way thats easy to understand. Thank you so much.
very helpful, definitely need more teachers to break down topics like you. Awesome Job!!!
Thank you so much for uploading these videos I didn't understand anything in chemistry until I started watching your videos, you are so good at making concepts in chemistry that were difficult for me to understand into something very easy. I really wish you were my class teacher unfortunately I a stuck with a teacher who was an Oxford graduate ,who can't seem to let those Oxford glory days go... like if you have a teacher similar to this : someone who just likes knowing they are smarter than the whole class and constantly making sarcastic comments and when the whole 2 chemistry classes do terribly multiple times not being able to realise she is the problem.
made 7 years ago but this stuff is still my favourite!! so helpful!!
Thank you so much Eliot, this is so helpful. I try to understand it in the CGP guide but sometimes it sinks in so much easier when you're shown examples. Absolutely massive help. I hope to see more Chemistry videos 😊
you are creating future leaders! future chemistry einstiens dont stop!!! my gen well cure ebola in no time!
I don't know why I laughed so much at that comment
But but you can even spell Einstein.
Suha and you can’t even spell can’t
@@mabelsyrup588 and you can't even punctuate.
@@keke3897 You started your sentence with a connective, for shame!
Hi, I spotted a mistake when talking about the ez higher priority elements, it's the atomic number you need to take into consideration not the mass number of the element.
Your videos are really helpful and I understand each topic 10x better. Could you please make a video on structural isomerism especially explaining the chain, positional and functional group isomers?
Please do a video for transition metals, it's soo confusing!! Thank you in advance, you're a great teacher :) :)
+jeeva1996 I'm teaching that to my class at the minute and it's one that I certainly aim to get done!
+jeeva1996 And thank you for those lovely words :)
E Rintoul No worries, I only spoke the truth :)
These videos are amazing! You make everything seem quite simple and relaxed, and put it in terms I can remember!! Thank you!!
17:05 - Is it determined by the highest atomic number or highest mass number? Chemguide says Atomic number but will looking at highest mass number be OK also?
Just go with atomic number, stay safe bro :D
+FST NUKEZZ thanks mann 😊😊👏
at 8:53, why do you write one ethyl group as H3C and one as CH3? Why not just write both out as CH3?
Because then it makes it look like the hydrogen is attached to the carbon instead, which you could lose marks for in the exam x
4:44 - The “ough, noice” got me 💀 😂
At 17:07 the top carbon is attached to three H atoms (total Ar=3) and the bottom carbon is attached to two H and one carbon (total Ar=14) is that why the bottom has the highest priority?
Thank you! you explain things so well! ^.^
+Emma:) That's very good to hear :) thank you.
Hi, i love your channel and you helped me get an A in chemistry AS, this year, i was just wondering when you would finish the Chem 4 and 5 units now im in A2, i appreciate that your busy, but i would really like it if you uploaded the remaining videos as they are such a great help.
+Black Marvel I will aim to get as many of them done as I can, but it's just difficult with time! But watch this space!
22:50
So the *group* with the highest Mr?
16:40 ish - how come the C=C bond was split horizontally before and now it's split vertically? It's the horizontal E-Z and vertical CIP or something?
+govinda sharma no he just drew it differently
+govinda sharma What the other guy said. The actual arrangement doesn't matter for the exam.
Thank you very much, this video was incredibly helpful! you have managed to make this really simple to understand. I'm curious about your two dislikes though, i guess its just some people doing it deliberately. We'll never understand those people on this site. Thanks again! =)
This dude saving students nine years after posting 🖐
isnt it atomic number for cip rather than mr ?
I've been trying to learn this for so longggg! Thank you!
Thanks, l have clearly understood E-Z. And for the sneeze, m praying for yah
what about the new a2 spec stuff?are you gonna do videos on them?
I'm late but for the last question, isn't there two of the same groups?? CIP system isn't needed??
So off the two carbons on the double bond, one has hydrogen and CH3, the other has CH3 and C2H5. Each has two different groups, so this is Z isomer, as the same CH3 groups are on the same side..? So the correct answer would be if CH3 was in the opposite side?
What is the two substituents with the highest atomic number were on the same carbon? Do you still find the group on each carbon with the highest atomic number or would it not be a stereoisomerism.
please please please could you do a video on equilibria?:D that would be amazing!!!
thank you for all of your videos! they are such a great help!
Please can you make a video about optical isomerism in the old A2 chemistry spec?
+Oliver Bradley Yep, it's one that I'll do in the future.
Thanks mate , making chemistry so simple!!
why do you separate the isomers horizontally then vertically that is the only thing that confused me
+Mubs S You need to look at priority on each side of the molecule, hence me saying to think of them as left and right. BUT, the actual EZ notation comes from looking at where the highest priorities lie, hence me talking about looking at it horizontally!
+Mubs S You need to look at priority on each side of the molecule, hence me saying to think of them as left and right. BUT, the actual EZ notation comes from looking at where the highest priorities lie, hence me talking about looking at it horizontally!
why is the line going down the middle vertically at 16.25 but it was horizontally before.
nicee...........it will surely enhance knowledge******
+Pradeep Dc Fingers crossed!
why does But-2-ene have e-z isomerism because i thought that the CH3 was part of the chain and so not classed as a separate group? I have my exam tomorrow and I'm really confused about isomerism!!
sorry if this is too late. When you're drawing E/Z isomers you just draw the double bond out fully. Then the structural formula for either side of the double bond. So if the CH3s are both on the top/on the bottom its Z, if theyre diagonal to each other its E :)
What Jasmine said! The alkyl groups ARE part of the chain and they are named as such. However, it is their attachment to the C=C that governs E or Z isomerism.
+E Rintoul btw I literally found you today and you have saved me, thank you so much!
thankyou so much both! so glad both exams are finished!
Do you have a video on structural isomerism?
+Maisha Hussain Not yet. It is coming!
do you have any videos on alkanes? I use all your videos for revision and they are very useful thank you so much it makes a high difference !
+Nathalia Campos I think so... Have a look in the playlists.
in quarentine studying for my resit because yr 12 was f'd up
hi,
are you going to be uploading any videos for Unit 4 and 5 from the old spec
+My112 Y Yeah, definitely. All my kids are still on the old A2 so I want them to have the videos. Plus, they are almost all going to remain when the new spec comes into play for the full A-Level!
My exam is tomorrow but I have an urgent question - with E/Z isomers, will they have the same repeating unit in a polymer? Or the same polymer? Thanks for the videos by the way! Lifesaver
thanks for the video I really understand it now but I've got a question; Can you have E-Z isomerism in pentene when there is a methyl group on one side and 2 methyl groups on the other?
+Tanzeel Ahmed Hashmi I'm not sure that what you have described would be pentene... Do you mean methylbutene? Either way, in a situation where you have one methyl on one side (with a hydrogen atom also attached to the carbon of the double bond) and then two methyl groups attached to the other carbon atom, you cannot have E-Z isomerism. No matter how you switch the groups around, the molecule will always be the same. You get me?
+E Rintoul oh yea I'm sorry I meant methylebutene and thank you so much I got it and understand it now! :-)
My chemistry exam is tomorrow thank you for this!! And by the way now we have to do chemistry exams for Btec as well which is really annoying
Thank you so much! Do you have any videos on structural isomerism?
Beautiful video..just beautiful sir..THANK YOU 👌🏻👌🏻😁😁
have you done any videos on Optical Isomerism A2 material?
i dont understand the last question because it says to draw an E isomer but hasnt he drawn a Z isomer since the same groups are on the same side (CH3). someone please explain im confused??
No, because the c2h5 takes priority for that side
ah you wonder this video is great! thanks, helped loads! :)
Thank you so much! Is it okay to watch,despite the fact i do OCR?
Eric, can you reply me with a place for purely organic chemistry past paper questions if you know of any? Had a mock today - Got 34/78.... Been watching your videos and I just cannot believe the difficulty of my AS-Level test today. The polymer section, the mechanisms of Alcohols as well... Even simple parts like naming compounds but the problem was that, they were in the format of say, CH3CH2(CH3)2CCH???... etc which confused me
Your channel helps a lot. Thanks
Shouldn't you be considering the atomic number not the atomic mass when assigning C.I.P priority ? Although it doesn't make a difference when working out the form of isomerism as long as your consistent but when attempting written answers you shouldn't mention relative atomic mass you should mention assigning property via atomic number.
E comes from Entgegen in German which means opposite, Z comes from Zusammen which means together.
Such a legend man I love you
+E Rontoul so have you covered the new spec for this years 1st year a level students? and these videos are great for first time understandings 👍 good work
i just started chem alevels and have a teacher who is exceptionally bad at teaching. (been taught by her since y7 now. hasnt got any better) its taken my teacher 2 lessons to teach less than what you taught me in a 30min video thanks gonna show my class ur videos
Thank you, I really find the questions helpful.
your videos are really good. I wanted to ask how you actually write that stuff and what screen cast ( if you use on) you use and how you get to write so clearly. try specifiy the detail pls?. thnk you
+Saif ahmed I use a graphics tablet to write and I record everything using Camtasia. It really is amazing software!
haha The sneeze of the legend😂
thankyou, you're teaching is amazing
Very helpful, thanks!
savior
can i use this for the new edexel spec,i believe they are similar
+kingchris5889 There will be similarities.
God bless you sir...thankyouuu
guys helpful tip to rember just know that e is same as enemies and enemies always fight on the opposite side of the battle field
Youre amazing
atomic number or relative atomic mass
"lets find myself a nice colour.. OOGH..nice"
what if some1 wants to retake chem1,2,4,5 exams in 2016 will they be able to or not?
+NirajC72 This is a cracking question. First off, units 4 and 5 will be there, as the June 2016 series will be the last so that's not an issue. But, there is a potential problem with resitting the AS units as by that point, there will be a new specification. I think that AQA will make another paper each for Units 1 and 2 for those who wish to resit...
Herro? Do you have a pay-pal page or something? u honestly deserve money for this
You really don't need to pay me. However, if you're absolutely desperate to, there is a link on my channel homepage
Thanks
Thank you!
Bless you
This is helpful to an extent
Seth Crockett It's a shame it doesn't get past the extent. Any feedback?
E Rintoul your videos are good and I only said to an extent because I’m still not too sure about the pi bonds which I was taught today
As far as I'm aware, pi bonds aren't officially in the specification.
Have a look at this page for a little more help: www.chemguide.co.uk/atoms/bonding/doublebonds.html
E Rintoul ok thanks
Thank you ^____^
hi, soooooo I take chemistry in AS levels and I took it in IG ,but I got a C in IG , ive always faced problems with chemistry through out the years , do you know what I can do about it or anything I should do to get a better grade before my AS exams reach, I did my pre mocks and mocks and got U and E as my grades , it would be really amazing if any one can help me with this problem ASAP
I don't know whether this would a much of help but, just do practice papers, like a lot. Check for the mistakes u do again and again and check online resources. Even while watching these videos, write a summary in a way that u would be able to revise later.
Plus, good luck!
sounds great thank you so muchhh
Yay glad it helped! My AS starts on the 11th as well.
Positivity Bloom eyyy good luck too ☺️
Z isomer is when they are on ze same side. Just a little way to remember it.
love it
bloody genius
The goat
z-zame/same E- eppiste/opposite :)
There is a god...his name is E Rintoul, thank you so much!
Thanks alot
I think the only think missing was Alkene + KMnO4 (cold/dilute--> ketone, hot/conc--> aldhehyde--> carboxylic acid).. please add that if you can, would help a lot of us
+Yash Verma As far as I am aware, this isn't something that is required for the AQA spec...?
trans: transgender is going across genders
hope u remember now!
brilliant
Just like Shisui
@@NEUROSHOCK123Channel yessir
ur like the messi at teaching chemistry.
Cheers.
The German terms are correct!
Oo nice
+I said ŚTFU Yeahhhhh.
bless you
this dude...
dude let me say what i want
whatever man just shut up
i´ll shut up if i want to shut up
bruv shut up or imma beat your ass
This video has a very low volume issue. One can't hear what the teacher is actually saying.
i’m in love with you
I remember e as enemy and z for other
why is your handwriting so spiky? are you really angry or something?
+Lorraine Cameroon Yes.
'zis in the same' 'e is the other'
Open the Doors Like A Tesla
Jericho walls we a wrestler
Open the Doors Like A Tesla
Like A Tesla (ayyy)
Yeah we know I’m about to go autopilot with my psilocybin flow
Yeah the kids back out from syntax used to hate myself
When to the forest then I woke myself
Up!
Hhhhhh
way to remember if e/z - z is on cis zame zide (German accent )
your computer performance is slow