Bonding, Shapes & Polarity | Multiple Choice Question Walkthrough 1 | A level Chemistry

Bonding, Shapes & Polarity.
Multiple Choice Question Walkthrough 1.
Question Download:
drive.google.com/file/d/1Zo9W...
Shapes of Molecules Explained:
• Shapes of Molecules | ...
Intermolecular forces Explained:
• Intermolecular Forces ...
Intermolecular forces Question Walkthrough:
• Intermolecular forces ...
Bonding Question Walkthrough:
• Bonding | A level Chem...
Electronegativity and Polarity Explained:
• Electronegativity & Po...
00:15 Coordinate Bonds
01:54 Shapes of Molecules 1
03:58 Macromolecules
04:58 Polar Bonds
06:29 Hydrogen Bonding
08:37 Crystal Structures
09:36 Electronegativity
10:35 Shapes of Molecules 2
12:48 Delocalised Electrons
13:47 Boiling Points
16:00 Types of Bonding

[@gracechen2412]

this walking through is extremely helpful! Thank you heaps!

[@chemistrytutor]

😀👍 Excellent! Thanks for the feedback

[@milkbread4527]

Thank you for your hard work, these videos really help! May I please ask you to make a video on inorganic analysis? I'm struggling to learn all the observations and make them stick. Thanks in advance.

[@chemistrytutor]

Thanks for your kind feedback 😀
Group 2 and halogens are on my list for after Christmas!

[@milkbread4527]

@@chemistrytutor Sounds great! Would be ideal if your video comes before my mocks in January, but I don’t want to rush you.

[@chemistrytutor]

@@milkbread4527 that should fit in with my plan. Keep a look out for them 👌

[@lizziellama]

Why does D in question 10 have an electron deficient hydrogen? How do you know if something has an electron deficient hydrogen? Thank you so much for these videos!

[@chemistrytutor]

You're very welcome.
In questions like this you're looking for a hydrogen atom bonded to something highly electronegative, typically a N, O or F atom. This means the electronegative atoms has a negative inductive effect and pulls the electrons from the bond it shares with the H towards itself and away from the H. This leaves the H slightly positive. In this case, in d, its the H attached to the O from the acid functional group

[@chemistrytutor]

This should help explain things in more detail for you
th-cam.com/video/81DFZQTDD2g/w-d-xo.html

[@user-fizz-r6y]

Thank you
Very useful video

[@chemistrytutor]

😃 👍

[@peachtea532]

thank you for posting videos, they help a lot as an independent student resitting for exams in summer 2023! I thought i should ask for some advice - ive just started my revision 'officially' now and im really worried because i feel i started late. Do you have any advice for me relearning everything on my own? thank you!

[@chemistrytutor]

Well first of all, forgive yourself for starting now as you can't change the past.
Secondly, you have to be systematic because you're in charge of keeping yourself on track and seeing the big picture. This means you need to start from the very beginning of AS with atomic Strucure and moles etc. You also need to make sure you tick off your progress in a book/revision guide, specification or checklist.
You need to also maintain discipline and make sure you work often and with focus. But with breaks.
Finally the revision method needs to work for you. It might be you watch TH-cam videos to revise content then practice exam questions, or maybe something else that works for you.
I've got loads of a level videos from a range of topics. Certainly full of nearly all the Y12 content and lots of y13.
I'm working on a master document of links to all of them, so you can keep on the lookout for that if it would help.
Good luck 👍

[@peachtea532]

Thank you so much, this is really helpful! Do you think it’s realistically possible for me to get an B or A in the time I have left? Again I’m so appreciative you put out these videos, thank you.

[@chemistrytutor]

@@peachtea532 Difficult for me to say for all sorts of reasons. But what I do know is you need to think positively and more importantly act positively. You need to think that it's possible and act in ways that give you the best chance of it happening

[@marigeo24]

(1) @4:50 I don't understand what makes B a macromolecule and not C, if they're both covalent
(2) Is it correct to say that (permanent) dipoles can ONLY exist between hydrogen and another non-metal atom? Meaning, if it's not: F--H, O--H, or N--H, then it's probably not a hydrogen bond?
(3) Since hydrogen bonding requires a lone pair from the FONding part, is it correct to say that ammoniUM (rather than ammoniA) cannot have hydrogen bonds because there are no lone pairs (and also a positive charge)?
(4) @15:10 aah so really in hydrogen bonding, there's a hydrogen (between) two highly electronegative atoms and bonded to one, not only just neighboring one of them. You have to check both sides of it. But does the bonded electronegative atom necessarily have to be F,O, or N?

[@chemistrytutor]

Thanks for all these great questions!
1) SiO2 is one to know and recognise. That formula is simply a ratio of Si:O (1:2) as part of a bigger picture. That's what makes it a macromolecule. Whereas P4O10, literally has those 14 atoms.
2) I think you mean hydrogen Bonding in your first sentence. Yes, you're correct
3) correct
4) correct, especially for A level. Although in reality and beyond a level you could potentially have a H bond between HF and HCl.

[@marigeo24]

@@chemistrytutor and thank you for your answers!
(1) is it the ratio of 1:2 that matters?
(2) does this mean that there is only one “permanent” dipole: hydrogen bonding and only one “temporary” dipole: van der waals?
Then what is a dipole-moment?
(3) So for it to be a hydrogen bond, the atom that bonds directly to hydrogen doesn’t need to have a lone pair, but the neighboring atom that isn’t directly bonded must have a lone pair?

[@chemistrytutor]

@@marigeo24 1) SiO2 is a specific substance that forms a macromolecule that you need to know. The ratio is not special, other than the fact it's silicon dioxide ratio
2) you can have permanent dipoles without HBonding.
A dipole moment is when permanent dipoles are non symmetrical and don't cancel out.
3) correct, but like I say A levels normally keep it simple and have the H bond between 2 things that are fully capable of H Bonding

[@xtrasss]

thank you is there anyway i can donate to show my appreciation? you’re saving my grades

[@chemistrytutor]

I'm really pleased it's helping! Thats a really kind offer! If you want to join the channel there are various levels of donation you can make 😀

[@xtrasss]

@@chemistrytutor thank you for letting me know!! please continue making videos they help me more than my actual chemistry teachers and tutors

[@chemistrytutor]

@@xtrasss thank you, that's really kind 😊
More paper 1 questions coming this weekend

[@xtrasss]

@@chemistrytutor looking forward to them ☺️

[@chemistrytutor]

@@xtrasss th-cam.com/video/xaYZenxEwu0/w-d-xo.html
Here you go 😀

[@ZondieMusaja]

Video manyama🎉❤

[@chemistrytutor]

😀

[@abz7800]

Why do you skip question on pmt

[@chemistrytutor]

I'm afraid I don't know what you mean?

[@abz7800]

@@chemistrytutor if you look on physics and maths tutor multiple choice question . The order in which you do question is different and some of the questions that are there you don’t do . I was just wondering why cause I was finding your vids useful but the questions I had trouble with you didn’t go over

[@chemistrytutor]

@anasb2063 I see! The differences are simply because I don't get my questions from there. I do a few different places. If you're interested, I do have a channel membership plan where you can send me questions and I'll make videos of the answer