This video is massively helpful BUT I have a question for the Manganese Precipitates you say LIGHT BROWN but in previous videos used PINK. Is this because the spec has changed?? In the Set 1 Practice Paper for OCR A it says PINK so now I am very confused and I emailed the Exam board and "they can't say"
For most complex ions, my textbook has the same ones shown here. But additionally, it has 1-4 colours for every transition element in aqueous. So for aqueous ions, do we only need to know the ones mentioned here (Cu 2+, Fe 2+, Fe 3+, Mn 2+, Cr 3+)? Because the textbook has about double that
Megan Law Cr3+ is violet in aqueous solution but it's green when it's the product of a dichromate oxidation because the solution is acid which changes the ligands slightly due to the H+ (you don't need to know this)
Sir in my textbook it says that the aqueous chromium 3+, [Cr(H20)6]3+, is a green solution and not a purple solution? I also do OCR A and it's in the yr 2 blue textbook?
having to memorise the colours might be the cruelest aspect of a level chem
You used to have to memorise a lot more 💀
it really is
Back in my day ……..
@@MaChemGuy It's still done in most asian syllabuses. You are rquired to memorize so much that this seems like a piece of cake.
I love how you showed actual photos of them, helps sm for it to actually feel real
starting my revision today for exam on Monday thanks for the video!
same lmao
me too
im starting now please give me your strength... Good luck to you and everyone else also!
just started now, already feel like giving up
Like me on my bike ride this morning!
bruh how am i gonna remember all this 💀💀
Skill issue smh
Thank you!!
👍👍👍
This video is massively helpful BUT I have a question for the Manganese Precipitates you say LIGHT BROWN but in previous videos used PINK. Is this because the spec has changed?? In the Set 1 Practice Paper for OCR A it says PINK so now I am very confused and I emailed the Exam board and "they can't say"
ETHAN WEBB Light brown, beige, pink, buff all accepted colours
Thank you!! That's Brilliant
Thanks!
im cooked
For most complex ions, my textbook has the same ones shown here.
But additionally, it has 1-4 colours for every transition element in aqueous.
So for aqueous ions, do we only need to know the ones mentioned here (Cu 2+, Fe 2+, Fe 3+, Mn 2+, Cr 3+)? Because the textbook has about double that
The ones you list are all the aqueous complex ion colours needed. There are others, hydroxide ppts etc
ocr.org.uk/Images/598991-colours-of-inorganic-ions-and-complexes-poster-.pdf Hopefully this finds you in time.
Do we only need to know the copper and chromium colours with ammonia - also why does copper bond to 4 nh3 but chromium bonds to 6
Thanks
Hi, I thought cr3+ was green? Would that be marked wrongly in an exam?
Megan Law Cr3+ is violet in aqueous solution but it's green when it's the product of a dichromate oxidation because the solution is acid which changes the ligands slightly due to the H+ (you don't need to know this)
do we have to learn the colours off by heart for the exam ?
Rama I’m afraid so
Sir in my textbook it says that the aqueous chromium 3+, [Cr(H20)6]3+, is a green solution and not a purple solution? I also do OCR A and it's in the yr 2 blue textbook?
Siam Sama If it’s pure it is purple, any impurities present cause it to be green. OCR will accept either colour
@@MaChemGuy alright thank you
thank mr chemguy
Horep You’re very welcome
Half an hour before my exam, I'm cooked
are you gonna finish this series by the exams ie june?
also biology do you know biology pls?
LegendaryVegeta Just going to keep making them tbh
I thought [Cr(H2O)6]3+ was a green solution and [Cr(NH3)6]3+ a violet one.
In its pure form it’s violet. Presence of impurities give it the green colour. Exam board accepts both colours