AQA A-Level Chemistry - Intermolecular Forces
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- Опубліковано 4 жов 2024
- This video covers the sub-topic of Intermolecular Forces from the main topic of Bonding.
Beginning with the forces and then details about each, it ends up looking at some past exam questions.
The students you teach are so bloody lucky to have you as a teacher
+IshyB135 I'm not convinced they would agree... but thank you for the kind words!
+E Rintoul lol wait till they get their results then I'm sure they will :)
Oie 1 mahina agadi ko chem test ko lagi padira?
lmao
Hey, I am a human from the future. That is not how it actually works. You see, different situations, environments, and some other stuff contribute to what will ensure the most efficient teaching and learning. In a classroom environment, this teacher could have difficulty sharing the exact same information within the same time frame, with the same voice tone, and with no package loss. haha. Due to it being a video there are no other students to provide distractions and thus increase the duration of the lesson and package LOSS!!!!! dun dun dun. Indeed my friend, sitting alone watching a video and taking notes is not comparable to being in a class with other people. In the same way, you can not compare flashcards with just reading the notes. Both work well, but to what extent, and for who? WHO WHOO .... this reminds me did you know, owls hunt other owls? Maybe we should alert the parliament of owls. haha, owl puns are fun. Do you know what else is fun? Finding out whether we live in a simulation and to find out why our miserable souls have been placed on to the earth, why we are not who we think we are, Why we exist!!!!! AND Why I will never be able to finish all of the game theory and vsauce videos in time for tonight's anime marathon.
@@giornogiovanna3139 thanks for your words of wisdom Giorno 👍
You are actually going to save my AS grade
+Ijaz Sultan Haha that's not at all true but thank you nonetheless!
+Ijaz Sultan SAME
tea.
who's watching this legendary youtuber a day before the exam?
Keep doing past exam questions please, I find it unbelievably helpful when you go over them identifying where the marks lie!
Thanks for all your videos, amazing work!
+Max Raven I certainly shall do! And thank you for the kind words!
I wish my Chemistry teacher was half as good as you, everyone in my class uses your videos for revision/learning. Thank you for all the effort you put into them
You are currently saving me from being failing AS Chemistry all together. I come home after a lesson and just switch your videos on straight away because my teacher teaches me nothing (He thinks he is a million times better at teaching than he actually is). I am constantly getting told I shouldn't be doing Chemistry, but thanks to you I am actually understanding all the content, because I am actually learning and being taught it. I sit on a evening playing you videos with my textbook open as if it was a lesson. (Because I am clearing gathering nothing from my actual lessons.)
+Sophie .Jayne That all sounds like a right hassle. But I'm glad you're coping and finding ways to deal with things. Let me know if there's anything I can help with and keep working hard!
hi, how did your chem exam go
Video was made when I started year 7 now watching this in year 12 prepping for UCAS exams... time flies
Wish we had teachers like you here sir! You work help us a lot. Please never stop
Wow, understood all of it! Thanks so much you are a savior! Your students are hella lucky.
your videos are so so amazing!! They're keeping me going strong through A-Level chemistry, thank you!!
+niamh_violet I'm very glad, Niamh!
Seriously thank you so much for these videos, I have been basically teaching myself Chem and I have learned more from your videos in one day then the entire month and a half I have been in school! Thank you!
this is video is very good, had trouble with intermolecular from months. This helped to understand a lot and also had qns discussed . Thanks sir for the video
I'm so lucky I have a friend who recommended you to me, I've got two weeks to sort out my grades before my mocks and I might actually do it with these videos, I'm understanding chem so much more already
when u attempt past papers and apply the knowledge, it helps sooooooooooo much
always saw ppl commenting these but here i am, wathing this a day before my as paper. feel like giving up but this man is keeping me going
You explain these in such a simple but understanding way
I loved this video so much! Honestly, it helped me loads and made this topic super fun and easy to understand finally! Total game changer - very happy
Thank you so much. Your clips really help. You might actually save my as grade in chemistry.
Thanks again 😊👌👌😊😊😊😊😊😊😀😀😀
Amazing video thank you!! Btw it is soooo helpful when you go through the relevant exam questions at the end it really made me fill the gaps in my knowledge!!
so easy to understand when you explain chemistry, I cant seem to take it in with my current chemistry teacher you're a great help thank you. I will watch you all the way through my A levels :)
I actually love you, and this subject... Great videos thank you! :)
+galefray Galefray, we barely know each other. But thanks.
@@MrERintoul people are just being thankful so just thank them instead of saying u don’t know them
@@zlayer_115 Lmao relax, he was just kidding.
@@galefray oh my b bruh
You are such a good teacher. Thank you for enlightening us with your knowledge
your videos are genuinely awesome I don't usually comment much but have to here bc they are so helpful! plz keep doing them!
Thank you soooo much for your videos. I didnt do so well in my previous exams but for the first time...just looking at your videos I am finally understanding the subject. Thank you very very much :D
than you sooo so too much for your amazing videos
I missed a lot of school because I had a lot of tournaments last term but I'm catching up because of your videos... I won the chemistry prize last year and I will credit it to your help as well as my brilliant teacher who unfortunately left our school last term.... thank you so ,much
Just a quick observation. In question 1c) I’m pretty sure the strongest intermolecular force would be van fer waals. This is because the molecule will adopt a tetrahedral shape in which the dipoles will cancel out and it won’t be a polar molecule.
This is brilliant, clear and easy to follow explanations ...finally I understand intermolecular forces. Thank you so much!
I'm in love with A-Level Chemistry Mr Ritnoul. Cheers :)
Thank you so much your videos are soooooooooo helpful! God bless you.
A-level is going to be so easy.. now I have found this UA-cam channel
Really great video! Love your no nonsense approach and the way you go through the exam questions is very useful. Thanks! :)
Thank you so much, your videos are always a huge help!
Kate Clarke No problem at all, Kate!
THANK YOU sir for the effort and time you put into your videos
Nah Ra is Radium :)
The graph should say Rn.
Good luck in the exam tomorrow, everyone!
thank you so much, love the question solving part. Brilliant way to teach!
Your videos are absolutely amazing! I'm understanding chemistry so much more with your explanations.... thank you so much! Also, I was wondering what you mean by the titles of these videos "NEW & OLD SPEC", are you referring to the new 2016 SPEC or does "NEW" mean the 2015 spec? I'm asking because I've realised this video was uploaded on Feb 2015.
Thanks a lot for doing all these videos man, helped me and my friends out so much. Fingers crossed for the exam haha, cheers again!
Raphael Viana You'll be ace - just keep working hard!
every one has already said this but man you are a god send thanks a lot best teacher i have ever come across and that's through a video XD
Thanks alot bless up am rilly getting 🙏
Thank you! This was really tough to read about as it requires lots of thought. I tried the exam questions at the end before you give the answers and I got them all right apart from the last one. I mentioned that "Hydrogen bonding only takes place between molecules with partially negative Oxygen, Nitrogen and Fluorine atoms attracted to molecules with partially positive hydrogen atoms" I didn't mention the phosphorus's negativity :s
Boro Jen xX Good work!
I wish I had found these videos earlier because they are so helpful! Kinda too late now but last minute cramming as my exams tomorrow!
You are an awesome teacher and it's not relevant, but I like your handwriting. Keep going with your good work!
only started my as levels and your videos are great for me, I have fun and learn whilst watching them, only wish that there were these videos for biology aha, thanks very much.
+Rega Ali I've considered doing some Biology videos... Maybe in the future!
+Rega Ali And thank you for the kind words :)
+E Rintoul yeah if u could do biology videos it would be great but for now these chemistry ones are brilliant
Your videos help me so much lad, my teacher’s a mess I swear. Thanks a pile hie
I love your videos
You are so helpful
Thank you for your effort!
What a coincidence, just been doing a bit of revision on this exact topic as vdw came up in a u1 exam and I was getting a bit confused, good video as always!
Matthew Cooper A good coincidence indeed! Thanks!
Thank you my dude. Glad I found your channel.
Haha, it's funny how my AS Chem qualified (somehow) teacher learns from your videos too. He doesn't even know why cinemas have staggered seating. He's probably reading this whilst he's teaching...his mouth how to consume crisps.
Nice to see you continuing your videos, keep up the good work.
Twenny Wan I'm sure your teacher means well! But thanks for the kind words!
Thank you so much for making these videos!! Your explanations are so clear and easy to understand :)
this was just fabulous hope there r videos on all AS A level topics
+peter sameh I love the word fabulous. Thank you for using it.
Did you make a video on electronegativity?? Since you knew straight away the differences between electronegativity when predicting the hydrogen bonds.. Also for the last question could you have wrote there isn't lone pairs in phosphine or is that wrong? Many thanks.
3 years ago!!!!!!!!!!!!!! What grade did you get?
@@edwardjarvis3442 lol r u doing AS now hahahaaaa
Muna Ali yeahh why
@@edwardjarvis3442 so you are now doing A2 good luck man
mate absolutely epic
You my friend are AMAZING,
+Faisal Hussain Thanks, Faisal!
My exam is tomorrow, it’s 2am now, I’m cramming everything and your video was AMAZING..
This was very helpful thank you so much
couldn't have said it better! 👏🏼
Excellent Video ! Helped me alot, Thank You.
Umer Khan Spot on - glad it was of some help!
Hi, can you do exam questions at the end of every video please as they are really helpful and can you make a video on electronegativity and which parts of the spec it links to?
thank you for these videosss!!
Hey man thank you so much from the core of my heart.....
hey , ur videos have been a great help ! thanks for the uploads ! :)
sameh hossain No problem :)
i was having a hard time learning this as I'm currently a GCSE student studying a levels independently and your videos are bangin'! thanks for making this channel!
That's very clear bro. Thank you so much
Just to make sure, do the examiners allow the use of the three dots for a shorter way to say therefore? By the way these videos are really helping me out thanks a lot for your effort.
+FXRain Yeah for real! I love me some 3 dots.
for question 1c) ccl2f2 wouldnt it be symmetrical so therefore nonpolar?
how can we know that a specific molecule has enough difference in electronegativity?
The way you talked about Dnaa and replication in this, you should consider making biology videos!
+Glitterfm2133 It's something that I've toyed with, and I used to teach AS Biology as well, but I don't know...
+E Rintoul PLEAAAAAASE DOOOO
Eliot Rintoul I would absolutely love it if you were to do so. Even if you didn’t want to do every topic, just covering some of the harder AS topics like ‘The Immune System,’ ‘Oxyhemoglobin dissociation curves’ ‘Digestion of Lipids’ and ‘The Sodium Potassium Pump’ it would really help a lot of students! :)
sorry im still a bit confused. as in how do you know CCl2F2 had dipole dipole but CH4 is just van der waals. like how can you tell which one does and doenst
+campervan20 I'm not the uploader but hopefully I can help :) What I do is draw out the molecule and then label where the electrons are being most attracted using an arrow. I always go positive to negative. When I'm done, I look at opposite ends of the molecule and if they have separate charges, there is a dipole and hence dipole dipole forces. If not, there's just VdW's.
Hey thank u so so much for such informative videos .they r helping me a lot.
yes!!!! i understood thank you very much for this vdeo kpt up
+Pradeep Dc Excellent! Well done :)
Let’s go dude cuz of you I got A* in chemistry
The Man
The Myth
The Legend
Where do you want your statue Eliot
Rintoul?
for question 1e) at 32:30, can you mention F2 is monoatomic and therefore will have weak van de walls due to its small molecular size
Hello,
May I know why the hell does CCl2F2 have dipole-dipole forces? Thanks! :D
Thank you for this video I feel I understand however there are definitely gaps in my knowledge.. 1) how do you know if a molecule is electronegative and which one is more than another? and 2) how do you know how many lone pairs a molecule contains?
thank you so much for your amazing videos!! could you please do a video on bonding? it would be a lot of help!:)
You're an amazing teacher !! really appreciate it
+Ilhan Ali Haha I'm not sure you'd agree if I was in the class with you! But thank you for the kind words!
Sir, when we are finding out the electronegative difference for dipole-dipole ......what is the range for the big difference in electronegativity??? 35:54
You are an amazing teacher!!! I wish you were my chemistry teacher at school!! I understood everything except for the phosphine one. Why can't H-bonding take place with Cl? Chlorine is more electronegative, right? I would be grateful if u could clarify it in the comments
I am really stuck on this aspect of dipole dipole molecules.
Basically, our teacher said that sometimes the delta postitve and delta negative bonds can cancel each other out, and so even if a molecule has permanent dipole bonds, it may not be a polar molecule overall, and will have no charge. Such as C02. I don't understand when these charges cancel each other out?! And I don't think you covered that in this video.
The first exam question you did, you said the strongest force was the dipole dipole force, but wouldn't the charges just cancel each other out on that molecule. Sorry for the long question, and if I sound stupid but I would really appreciate it if you could help me out. Thanks
+Amy Yeah, I just had this very conversation with my Lower 6th group the other day. The video isn't as heavy on polarity and electronegativity as it maybe should be, but I am going to be making changes to the videos over the next little while to break them down into more manageable chunks!
The way I explained it was that in some molecules, we have polar bonds. In a molecule such as HCl, the bond is polar. This molecule is also polar and therefore has a permanent dipole. Whereas, in a molecule such as CCl4 (methane with each hydrogen replaced by a chlorine atom), the C-Cl bonds are all polar, but basically the partial charges are balanced throughout the molecule and therefore cancel each other, leading to no permanent dipole. If you look at the shapes of the CCl4 molecule, you will see that it has some kind of symmetry and no matter which way you turn it, it is basically the same molecule.
I should say at this point that a permanent dipole comes from an uneven balance in a molecule (or what I described as the molecule being wonky).
Using the CCl4 example, but swapping one of the chlorine atoms for a hydrogen to go CHCl3, we still have 3 polar C-Cl bonds, but because of the introduction of the hydrogen atom, we find that the over molecule is now not balanced in terms of its charge. This is because the C-H bond is NOT polar and so the whole thing becomes wonky and as such, we DO have a permanent dipole.
Has that helped at all?!
E Rintoul Yes, this is really helpful thank you, I totally get why molecules can and can't be polar. So wouldn't that mean in the CCl2F2 in the first exam question you did, due to all the negative charges around the outside, wouldn't the charges cancel and so there would be no dipole-diple intermolecular forces? And so the strongest would be VDW?
Amy That's a little bit more of a tricky example as the chlorine and fluorine atoms have different electronegativities which would cause the bonds between them and the carbon to be different in terms of their polarity!
E Rintoul Ok I think I understand it now, thank you so much for your help!!!
you are a life saver!!
quick question. why can’t it be hydrogen bonding with something other than N,O,F that is electronegative
hi, recently I discovered ur channel and I must say that I am loving it. but I find it difficult to watch a full 30 to 40 minute videos so would it be possible for u to cut it down in sub topics??
thanks once again 😁😁
+Krupali Parikh I've cut some down into smaller topics. I am aiming to cut others down, but I don't know when I'll get around to it. My advice would be to just watch a small portion at a time!
One thing on that very last question (why no H-bonds in phosphine).
There is a lone pair present, so you might reasonably expect an H-bond. But as you say, despite that, the P-H bond has so little electronegativity (compared, say, to N-H in NH3) that it outweighs everything else.
Only 1 mark, I know. But in light of your earlier description of the importance of the lone pair in H-bonding, perhaps worth pointing out here.
Dont think hes gonna reply m8
As well as an adjacent hydrogen, you also need a highly electronegative atom with a lone pair: oxygen, nitrogen or fluorine. Phosphorus isn't electronegative enough. A little late, but hope that helps! 🙂
My teacher recommended you, and i can say that in a matter of a few weeks, my overall working grade has gone from a C to an A ..;)
really helpful video! thanks
Defintion of electronegative? It might've been in the video but I've watched it in parts thanks.
Yo Mr Rintoul,
One thing that tripped me up was the H2S, H2Se, H2Te graph.
These molecules have permanent dipoles and hence dipole-dipole forces right?
So why do we have to talk about the VDW forces??
Thanks in advance
***** Alright, chap? Nope, no permanent dipoles there. You're best to think of permanent dipoles occurring only where we have halogens involved. That help?
U Mad when you
one question- why does the electronegativity change in iodine molecule ..resulting in induced dipole? what causes this difference in one side of the bond being more positive and the other more negative??
Can you please do a video going over the Electrochemical cells topic from the A2 spec please?
If unsaturated fats are liquid at room temperature due to their shape causing them to have weaker VDW forces, then where does the part about double bonds come in? Wouldn't it make more sense if they were solids at room temp because breaking double bonds requires more energy than single bonds? How do they have double bonds if the VDW are weaker and the bonds are easier to break than saturated single bonded fats?
19:56 ayo
brooooo hahahahahhahahah
Hey, thanks for the video.
Would you be able to go over electro negativity at some point? And also, if you have time, perhaps mention solubility and how it links in with hydrogen bonding. My textbooks aren't doing the best job at explaining these concepts to me, and honestly your videos are the only reason I'm still maintaining an 'A' grade in mocks.
Thanks.
+Casio FX-plus I shall certainly try to. I thought I had actually done a video on electronegativity but maybe I'm just getting confused!
Thanks Phil
life saver love the vids
Thanks, You're videos are amazing but i was just wondering about a few things. at 26:30 do HI, HBr and HCl have dipole-dipole bonding? Also at 31:36 would you talk about bonding (i.e. covalent bonding) because the question says in terms of bonding or can this also mean hydrogen bonding?
Just outta curiosity do you reckon you can give a link in the description of AQA exam past questions specific to the video? E.g in this case a question on Intermolecular Forces? :) Your vids are really helpful btw
Never mind! Watched the bit where you do some of the Past Paper questions!
***** Spot on!
at minute 9:07 the symbol for radon is meant to be Rn
+Yas K Yep. It's an image I used from Google though, so don't shoot the messenger!
For question 1 (c) - I thought the dipoles would cancel because the shape is tetrahedral (four delta negative halides are surrounding the carbon atom? And therefore van der Waals are the only intermolecular forces present? I could be completely wrong though.
For question 1c why is the answer not vdw forces? The molecule is symmetrical, so it is non-polar and so no permanent dipoles?