Science, particularly Chemistry, can be really difficult. Don't feel bad if you need extra support... feel bad if you don't ask for help!
I've been teaching GCSE and A level science for 19 years now and my students have convinced me to start this channel.
I'll be posting general videos suitable for all exam boards about GCSE and A level Chemistry, and other equivalent qualifications from other countries.
I'll include:
* viewer requested content.
* topic reviews, where I'll Explain the key parts of a topic in one focused burst.
* Exam Question Walkthroughs, where I'll answer an exam question & talk out loud about how I'm thinking about the question and demonstrating how you can get all the marks.
* whole test walkthroughs, where I'll answer the paper, think out loud & give examiners report feedback too.
* predictions about upcoming exams. I'll do these for as many papers as possible... this is especially useful for A level Paper 3.
Hope it's useful!
Пікірлер
i dont really understand the experiment to determine kc and how concentration and pressure dont affect its value?
u talk wayyy too fast sorry
Sorry about that - I guess I just get really excited about the chemistry 😃 You probably know this, but if it's really too fast, you can adjust the playback speed in the settings to something like x 0.75 speed
@@chemistrytutor yep thanks regardless, im sorry for being fussy :D
@@chemistrytutor also u are 10x better than my chemistry teacher, i appericate it
@user-wf9li6wt4w thank you that's nice to hear. 😃 Don't tell *them* that though!
@@user-wf9li6wt4w 😎
Thank you for this video...
You're very welcome 😀
You have become one of my favorite tutors. Your explanations are so clear and easy to understand. Students who know you in real life are so lucky!!
Thank you for your lovely feedback 😊
Hi sir!! I finally finished all of my A-levels exams, and while I do not feel confident after them (did a lot of silly mistakes under exam pressure,) I still wanted to write you this message to thank you for your efforts and your videos! I started A-level chemistry really late into year 12 as I didn’t feel as much joy in it as I did for physics. I was struggling to cope with the work, especially as I had to self-learn a lot of the fundamental concepts which were developed in the course later on. While I benefited from a wide array of KZreadrs, there was absolutely no one like you. You made topics easy to understand, came up with loads of examples that actually came up this year (Edexcel)! And your question walk-throughs are amazingly helpful. A-level chemistry quickly became one of my favourite subjects due to how interesting and digestible you made it in your lessons. You never failed to answer my questions when I left them here, and each time I find myself struggling with a concept, your videos come in handy. I will update you on my A-level results once they are released (I need an A*, A, A for my top choice.) Thanks so much for your help throughout the two years. I would not be where I am in my education without you. Keep doing what you do best, I am sure many chemistry students appreciate you just as much as I do!
Can you make video on carboxylic acid and its derivatives, I got organic chemistry test next week
Not by next week I'm afraid. I've got a nucleophilic addition-elimination mechanisms video though...kzread.info/dash/bejne/pX6EzdV7n7vIeaw.html
at 13:00 peak is at 3400cm^-1, can it not be a N-H(Amines) too ?
It can. Usually, in an exam, you'll get given a molecular formula that will allow you to narrow it down. For instance there won't be an N in the formula for instance. If there is an overlap, then exam boards are careful to not have any of the other elements it could be present in the actual molecule
Hi, thanks for the videos. At 20:16, isn’t it 8.08 x 10^24 atoms or is it molecules?
Ah, good spot! Yes, it's atoms, you're right ✅️
Is this applicable to AS-level aswell?
Absolutely, yes 💯
Sir quick, Cristiano or Messi?
i wish i found this channel earlier :(
Good luck for today!
Good luck Everyone!!!
😀
this is my last time here so thanks for all the help sir <3
Well done for all your hard work
For question 3b would you have to say to add an indicator?
That's not necessary. A well selected indicator will catch the precise equivalence point, but a pH curve where you've measured the pH with a probe will do the same job without an indicator
@@chemistrytutor Ohh i see. thank you ver much
What if the PH starts from 2 ? Is it a strong or weak acid THANK YOU SO MUCH FOR THIS GREAT VIDEO ❤
I suspect you wouldn't get something ambiguous. I think the most confusing thing that would happen is they'd say calculate the pH of a weak acid, and you'd get something 'low', and you might doubt yourself. There isn't really a pH where one changes into another (partly because pH is also temperature and concentration dependent). So, 0-1 is strong. Above that it's not definite. If you got a pH of 2 or so for a weak acid, I wouldn't be start to doubt my calculator
@@chemistrytutor Thank you so much for your reply sir. Is this the case with PH 12. PH 13-14 is strong base and rest are weak right . May I know the range sir please
@katheriner6456 again, there isn't really a range for bases either. Strong or weak is to do with how they ionise rather than a specific pH. I think in terms of strong or weak you'll either be told its strong or weak acid or base... or it'll be one you need to recognise, so NaOH or KOH is strong... NH3 is weak
I can't find much on polarity and IMF for chromatography, is it just that if the stationary phase was polar and the moving phase was non- polar then non-polar compounds would pass through the column more quickly? thank you so much for these videos absolute lifesaver !
You're very welcome! Yes that's correct. Throw in a comparative phrase "attraction to..." or "affinity for..." and you're all set
absolutely exhausted from maths exam today so i’m just sitting and watching all your exam question walkthroughs especially the practicals, seriously so helpful you’re an actual lifesaver!! so stressed for p3 tomorrow i feel so unprepared but this is so so helpful thank you
Glad they're useful! Not long to go now
sirrrr, thank you so so much. I didn't know how I could properly revise but this video and your playlist have eased my stress and gave me guidance. You are a hero!
You are most welcome. Good luck!
I’m pretty sure there was barely any bonding questions in paper 1 and 2 as well
I think big omissions in particular from that topic are polarity, intermolecular forces, and boiling point
Just wondering if it’s possible to come up questions from topics / sub topics that has already came up? Also Thank you so much for the video this helped me a lot❤You are so kind.
You're very welcome. No, I think it's unlikely topics would come up again (certainly in anything other than multiple choice). There's so much on the course, they'll never test it all so they wouldn't duplicate by asking something twice
Do you think recrystallisation will come up
Could do, but I think it's unlikely. There were 10+ marks about organic preparations already, so I think that's a bit much. More likely, they didn't ask about distillation, and that links more nicely to polarity and IMF, but that's still low likelihood, really.
@@chemistrytutor ooh thanks! that makes sense
How did you find it@@fiya4444
@@ilovejesus6740it was not too bad, i memorised recrystallisation, multiple choice and the maths and graphs went well the rest i didnt rlly like.. wbu?
@@fiya4444 it was a bit difficult at the start, but by the time I reached the multiple choice questions, I definitely felt better, hoping it's enough to secure me a high B atleast
I thought chypsome was formed during flue gas desulfurisation? How come it's not?
You can make gypsum in fgd as well, you're right. The main mineral in gypsum is calcium sulfate, CaSO4. You can write either in an exam and the balancing for CaSO3 is easier, so I thought I'd use that one 😃
Goat
😎
which kind of chromatography do you think would come up? / referring to for RP?
If it's RP only then it would be TLC. I guess they could do a bit of a hybrid with GLC as well, but if you prioritise one type I'd say TLC
How many of these topics did end up coming up??
Most if not all.
Thank you so much for everything!
😀 good luck!
You said there wasn’t anything on weak acids but I’m sure there was a question on paper one where we had to use the equation for weak acid : Ka= [H+]2 / [HA] ??
The only pH calculations so far have been Kw and then reaction of strong acid with strong base
Oh yes kw=[H+]2 was used for pure water question I believe
@@IA-wq4gj that's right ✅️
Is there any statistics for the probability of a MCQ being A/B/C/D, such as the most likely answer across the past exams for if we need to take a random guess with a higher probability of being correct?
Not that I know of. I'd say try to whittle down a question from 4 --> 2 and then if you can't decide then do a 50:50 from there
from my knowledge its usually C or D but that varies in every paper, so if ur unsure i would guess one of them as they usually have a higher chance of coming up. but usually it's a fairly even split between all 4 options
@@i_love_dua_lipa1 @chemistrytutor thank you for the advice :)
Maybe free radical substitution could come up to. Not been up yet
Good call. I thought about that one. The reason it was lower down on my list was that it doesn't really have a practical focus
Just to check, was there not a gibb's free energy change question in paper 1? i think it was a calculation? i remember doing gibbs free energy change in paper 1 im pretty sure
Correct... I mentioned it in the video in the context of Graphs. There's not been s graph plotting question yet. And we are a little down on Thermodynamics so far
@@chemistrytutor ohhh sorry my bad, phew i got scared for a moment thinking i read a question wrong somehow and did gibbs 😅
@@yatsu4683 😎
there was quite a lot of stuff on period 3 for paper 1 wasn’t there?? 😭
No, not really. And very little on P3 oxides
Chromatography practical came up last year do you think there is still a chance
Yes, definitely still a chance. Some things come up nearly every year
really appreciate this sir by any chance could you make a predicted paper without MCQs would really really appreciate it thank you
Sorry, I've not managed to get on to this! Good luck for tomorrow !
@@chemistrytutor do you reckon redox titration is likely?
@aaliyah1670 I'd say probably low likelihood really. There was something a bit like that on paper 1
@@chemistrytutor r they likely practicals 2 3 4 5 7 8 12?
@@sussybaka8605 that's right ✅️
OCR PLEASE
Really sorry, I'm afraid I don't know that course well enough to do a video with confidence on that as I do AQA
@@chemistrytutor ok no problem
@@Equalhippo3156 CK chemistry has good ocr chemistry predictions.
I thought we already had quite a lot on transitions metals and acids and bases?
Acids and Bases... not really, quite a short question overall. There's normally at least 10 more marks on Acids, so I think that's in my top 3 highest likelihood. Transition metals, yes quite a lot. So that's why it didn't make it into my top 5. But I think those ion tests are a strong shout for maybe a series of MCQs.
@@chemistrytutor okay perfect thank you, fingers crossed for more acids and bases and no transition metals!
Hi SIR WHAT ABOUT SECOND YEAR A LEVEL TOPICS AND ORGANIC CHEMISTRY FOR EXAMPLE ALDEHYDES AND KETONES, CARBOXYLIC ACID AND DERIVATIVES PLEASE RESPOND
I've currently got those on separate videos, part of bigger topics about those areas. E.g. recently released a video for aldehydes and ketones and another one for Nucleophilic Addition-elimination
The goat strikes just as soon as you need him, Legend!
Here to help 😃
hi sorry can you do one for edexcel
i swear there are no prediction videos for edexcel sciences 💔
Really sorry, I'm afraid I don't know that course well enough to do a video with confidence on that as I do AQA
thank you 🙏🏾
You’re welcome 😊
Barns trophy presentation this weekend Rian
@@pickle_1395 i’m missing it man, on holiday 😢 fucking devastated. how did u find chem
Literally saving my alevel sir 🙏🙏
😎
I’m a bit confused, question 5 the answer is negative but for question 7 its positive but they are both formation (shouldn’t formation always be negative)
Lattice enthalpy of formation should always be negative, and dissociation positive. However, standard enthalpy of formation can be negative or positive. We encounter more exothermic ones in nature as they are more likely to occur spontaneously, but there are still some positive ones
@@chemistrytutor Thank you!! I just have 2 more questions if that’s ok, what is lattice enthalpy of formation? And in these multiple choice questions, would my answer always give me the right sign, like - or + or would i have to change it according to the question?
Sir, do u have KZread videos on physics topics???
I'm afraid I'm currently only doing chemistry videos
@@chemistrytutor OK Sir
How did u find the paper? There were so many 6 markers, which ones were the hardest in ur opinion tho?
Yes, I thought it was a tough paper overall. 4 six mark questions, although at least one of them was really a series of smaller questions so that one not so bad. If you're OK with calculations then the shapes and the ion testing with ionic equations was probably hardest
Thanks for this easy and quick to understand
Very welcome Good luck today 😃