Yo guys! I wanted to add something important!!! 1. There should be a 2 mole coefficient in front of Fe(H2O)3(OH)3 and Al(H2O)3(OH)3 to balance up the equation, not sure how I goofed on this, I even got it correct in the practice question. My bad guys!!! 2. Although [Fe(H2O)6]3+ (aq) true colour is purple/violet/lilac, in solution it often forms [Fe(H2O)5(OH)]^2+ (aq), which has a yellow-brown colour. This complex has lost 1 H+ ion when reacting with H2O in the solution. Please see this information from chemguide if you want more detailed information and understanding! (do a CTRL+F search for 'in practice' subheading) www.chemguide.co.uk/inorganic/complexions/acidity.html#top Thanks to the subscribers 'I know I'm wrong but,' and 'DY' for bringing these up 🙏♥
Could you do a video on the practical skills questions not specific practicals but like suggest an improvement to …. Or how to refuse percentage uncertainty for …. I’m stuck getting around 80-84 on papers just missing out on an A* on each paper I keep dropping practical skills marks
Good question! In hindsight it was silly of me not to mention this... yikes! Although it's true colour is purple/violet/lilac, in solution it often forms [Fe(H2O)5(OH)]^2+ (aq), which has a yellow/orange/brown colour (varies in strength of colour). I will make a comment and pin it so you can see a more detailed response. Sorry about that!
It can be different in certain areas yeah! Just keep an eye on the specification for OCR A. There are some very good OCRA UA-cam channels for chem too :)
it is only 2 for AQA, you can check the specification if you want, page 48 :) filestore.aqa.org.uk/resources/chemistry/specifications/AQA-7404-7405-SP-2015.PDF
Physics and maths tutor actually use a lot of legacy past paper questions (2009 - 2015 specification), I assume it's to avoid copyright. this is the specification I did and you needed to know the Cr colours back then, but I am almost certain it is absent from the current spec, I have never seen it in any transition metal or aqueous ion questions.
You are 100% correct! You need the 2 moles to balance it up, sorry about that, not sure how I goofed! I even wrote it the correct way in the practice question 😅😂
Get 1:1 Tuition with me: www.easymodeexams.com/chemistry-tuition
smelly stinky topic I hate it!😣
im actually very pissed off that i only found about you now, youre actually the goat of chemistry youtube videos.
sorry u didn't find me sooner :( hahaha that made me smile, thanks
This is amazing, thank you so much I’ll come back to watch all this asap!! And also all the other walkthroughs 🙏🙏
Thnx for the kind comment, appreciate it :)
Yo guys! I wanted to add something important!!!
1. There should be a 2 mole coefficient in front of Fe(H2O)3(OH)3 and Al(H2O)3(OH)3 to balance up the equation, not sure how I goofed on this, I even got it correct in the practice question. My bad guys!!!
2. Although [Fe(H2O)6]3+ (aq) true colour is purple/violet/lilac, in solution it often forms [Fe(H2O)5(OH)]^2+ (aq), which has a yellow-brown colour. This complex has lost 1 H+ ion when reacting with H2O in the solution. Please see this information from chemguide if you want more detailed information and understanding! (do a CTRL+F search for 'in practice' subheading) www.chemguide.co.uk/inorganic/complexions/acidity.html#top
Thanks to the subscribers 'I know I'm wrong but,' and 'DY' for bringing these up 🙏♥
U are truly a boss man
@@faizananwar571 hahaha thanks man :)
was just about to ask this lolll but thanks !!!
sorry but im a bit stupid where exactly should there have been a 2 coefficient ?
@@MariamNuhu-fc9vz same i dont know where? i wrote all these equations out months ago and just saw the comment now
Could you do a video on the practical skills questions not specific practicals but like suggest an improvement to …. Or how to refuse percentage uncertainty for …. I’m stuck getting around 80-84 on papers just missing out on an A* on each paper I keep dropping practical skills marks
That's an interesting one! I'll do my best to get it out before paper 3 :)
@@easymodeexams33 please that would be so helpful and thank you so much for all these videos !!! ❤
quick question for 2:48 why do some resources say [Fe(H2O)6]3+ is a yellow solution? instead of purple
It’s acc purple but it gets oxidised in the air Abit
Good question! In hindsight it was silly of me not to mention this... yikes! Although it's true colour is purple/violet/lilac, in solution it often forms [Fe(H2O)5(OH)]^2+ (aq), which has a yellow/orange/brown colour (varies in strength of colour). I will make a comment and pin it so you can see a more detailed response. Sorry about that!
@@easymodeexams33 thank you so much, this was something that confused me for ages but now it makes so much more sense😃
@@iknowimwrongbut4491 my pleasure :)
Omg I needed this so much. I always do bad on these questions. Thank you so much!
no worries! Just keep revising and you've got this 💪😁
I’m doing OCR chemistry, your videos are still helpful. But seems like aqa is actually quite different than our spec, idk 😊thank you
It can be different in certain areas yeah! Just keep an eye on the specification for OCR A. There are some very good OCRA UA-cam channels for chem too :)
goat
Brilliant video! Thank you for summarising and explaining so well!! Perfect revision resource :DDD
At 00:52, why did you say there are 2 M2+ ions and not 3 including Co2+ (cobalt)?
it is only 2 for AQA, you can check the specification if you want, page 48 :)
filestore.aqa.org.uk/resources/chemistry/specifications/AQA-7404-7405-SP-2015.PDF
Hello sir,thank you for your amazing lessons , i was wondering if you could do tutoring ?
Thanks, I appreciate it :) Sorry, I don't tutor any more, good luck though!
Thanks you soo much your videos r realy great
thnx :)
thank you soooooo much for this
no worries :)
the goat
Thank you , sir.
you are amazing! thank you so much :)
what a guy thank you man
no worries :)
all your videos are so helpful thank you so much
thanks, glad you find them helpful :)
we dont need to learn the Cr colour changes?
This is the updated colours document I used: filestore.aqa.org.uk/resources/chemistry/AQA-7405-REACTIONS-OF-METAL-IONS.PDF
With Aluminium's reaction with a base shouldn't there be 4 moles of OH? 11:04
thats only if you react the hexaaqua complex of aluminium with excess oh, he used the white ppt and added oh
Thanks, Bless
at 5:00 can i put the cu(h20)4(OH)2 in squared brackets?
Not sure if its penalised but you do only need to put the square brackets if theres an overall charge
Yesss this is perfect thank you for this🙏
my saviour tysm!!!
No problem 😊
Do we need to know about flame test colour for the exam?
nah that's only GCSE.
If you're curious about anything you can always ctrl+f the specification and search for key words
@@easymodeexams33 oh ok thank you. Just wanted to double check as it was mentioned in my lab book.
So helpful ❤
Tysm ❤️
I saw in some papers in physics and maths tutor Qs you need to learn chromium colour changes . Do we still need to learn that ?
Physics and maths tutor actually use a lot of legacy past paper questions (2009 - 2015 specification), I assume it's to avoid copyright. this is the specification I did and you needed to know the Cr colours back then, but I am almost certain it is absent from the current spec, I have never seen it in any transition metal or aqueous ion questions.
21:50 i was doing some past paper questions and saw there should be a 2 before the brown precipitate of Fe3+ (and also Al)!!
You are 100% correct! You need the 2 moles to balance it up, sorry about that, not sure how I goofed! I even wrote it the correct way in the practice question 😅😂