I found it ironic that at the end of practice question 3 I said "hopefully you guys got that right", and I got it wrong 🤣😭 fml.... please don't do what I did, make sure to add a 3 after (C2O4) in the complex formed [Fe(C2O4)3]4- !!!! I've already rendered this video three times and had issues with the recording so don't have the time or patience to fix it 😂 hopefully all good with u guys! 🙏♥
I love the way you teach, very calm voice and knows what he's doing. This video was way better than what I was expecting. You just earned yourself a subscriber. Thank you.
i literally love you 😭😭. The way you explain every step is exactly what i needed, ive finally understand transition metals a day before exams after a million videos, i wish i found you earlier. p.s I had to stop halfway through the video to comment this.
Your actually the goat tysm, im resitting alevel chem this year as I wasnt happy with my grade in Aug 23 and you have been so much help so far! Please close to exam time season more vids would be appreicated!!!
sure man no worries. I retook all my year 12 exams and did year 12+13 exams in one year (did previous spec with 2 years of exams) so I've been there lol
This was such a helpful video! Much better than all the other videos I've watched 😭you explained it so well and in detail of everything we need to know. Thanks so much, your a lifesaver !!!!! 😭🙏❤ Definitely watching all your other video for Chem paper 2, gonna need that for sure 😭
Thanks for this video. I have a question: If a question asks why does Enthalpy change remain zero (for these types of reactions) is it because the same number of bonds were broken and formed for the metal complex?
I actually spent a lot of time looking into this before the video and it's honestly hard to tell because AQA doesn't explicitly say you don't have to know it, but I am almost certain that you do not. In the 2009-2015 spec, it detailed specifically that you needed to know all of the complex colours, and you needed to know the ligand sub and aqueous ion reactions for Cu, Co, Fe and Cr - but Cr isn't mentioned in the new specification anywhere as far as I can tell. I hope that helps :) old spec if you're interested in difference:www.a-levelchemistry.co.uk/uploads/9/0/4/5/90457821/aqa-2420-w-sp-10.pdf
nah, it goes from 6 coordinate bonds to 6 coordinate bonds. The number of ligands does not matter for coordination number, only the number of coordinate bonds.
Oh sorry I just got up to the part where you said we don’t need to know the colour changes for it but could they still use it in application questions?
@@aa-gn6zn the colour changes are off the spec, but not the equations etc. from AQA spec: Exchange of the ligands NH3 and H2O occurs without change of co-ordination number (eg Co2+ and Cu2+). Exchange of the ligand H2O by Cl- can involve a change of co-ordination number (eg Co2+, Cu2+ and Fe3+).
No specific tips tbh, other than using flash cards and blurting, and taking note of what you get incorrect often and why that might be. Hope that helps.
How comes with monodente complexes that have the Cl ligand you only put square brackets around the complex, and not normal brackets around the Cl ligand aswell for example [CuCl4]2- instead of [Cu(Cl)4]2- like it was with [Cu(H2O)6]2+
I believe it's because Cl- is an ion, but H2O is a molecule. It would be incorrect if you wrote H2O6, because that looks like 6 oxygen atoms instead of 6 water. Hope that makes sense.
