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Edexcel IAL, Unit 5: Transition Metals and Organic Nitrogen Chemistry. 22-Jun-2016

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Reply 200
Avatar for tgygt
tgygt
2
Why rubies and sapphires are of different colour?
How do u replace OH group with Cl
Original post by Level9
What was mass of Fe(II) and Fe(III)
i got 0.59 and 1.sth


Same here, is that fe2+ heavier than fe3+?
Reply 203
Avatar for tgygt
tgygt
2
Original post by 12103763d
Same here, is that fe2+ heavier than fe3+?


Nah
Electrons have negligible mass
Reply 204
Avatar for Quiton
Quiton
3
absorption of different wavelength of light, reflect different observed colour
Original post by tgygt
Why rubies and sapphires are of different colour?
Reply 205
Avatar for Quiton
Quiton
3
Talking about the mass of the ions in the solution.....and Fe2+ is not an electron. lol

Original post by tgygt
Nah
Electrons have negligible mass
Reply 206
Avatar for tgygt
tgygt
2
Original post by Quiton
absorption of different wavelength of light, reflect different observed colour


Because they have different attached ligands or that they have different central metal ion?
Original post by tgygt
Nah
Electrons have negligible mass


I knew, I mean the question asking mass of fe, the mass of fe2+ in 500cm3 is higher than that of fe3+ , am I correct ?
Reply 208
Avatar for tgygt
tgygt
2
Original post by Quiton
Talking about the mass of the ions in the solution.....and Fe2+ is not an electron. lol


Well, I mean Fe2+ with one more electron than Fe3+ would not be heavier than Fe3+. Both ions have Ar=55.8
oh no instead of saying structure XYZ i directly wrote (metal ion Cl(H2O)5) 2Cl-
do u think it'll be okay?
Reply 210
Avatar for Quiton
Quiton
3
It has nothing to do with the ligand... it is about the metal ion, the passage did mention sapphire has aluminium while for rudby, some aluminium is replaced by Chromium. And the splitting of d-orbital to a different extent.

Original post by tgygt
Because they have different attached ligands or that they have different central metal ion?
Reply 211
Avatar for tgygt
tgygt
2
Original post by 12103763d
I knew, I mean the question asking mass of fe, the mass of fe2+ in 500cm3 is higher than that of fe3+ , am I correct ?


Yes, that's what I got.
Mass of Fe2+: 1.xxxg (forgot haha)
Mass of Fe3+: 0.5xxg
Reply 212
Avatar for Quiton
Quiton
3
Same here! Is that structure Z ?
It should be alright cause it is exactly the answer!

Original post by skeletonboy1
oh no instead of saying structure XYZ i directly wrote (metal ion Cl(H2O)5) 2Cl-
do u think it'll be okay?
Reply 213
Avatar for tgygt
tgygt
2
Original post by skeletonboy1
oh no instead of saying structure XYZ i directly wrote (metal ion Cl(H2O)5) 2Cl-
do u think it'll be okay?


Sure
The question asks about deducing the structure
Reply 214
Avatar for Fone321
Fone321
Same here.. Didn't even notice there was 3 structures XYZ??!
Original post by Quiton
It has nothing to do with the ligand... it is about the metal ion, the passage did mention sapphire has aluminium while for rudby, some aluminium is replaced by Chromium. And the splitting of d-orbital to a different extent.


Different ligandssplit the d subshell to a different extent and so electrons requiredifferent amount of energy to promote. e.g. Cu(H2O)6]2+ and [Cu(NH3)4]2+
Reply 216
Avatar for Quiton
Quiton
3
Not sure what you are talking about.

You have to look at the concentration of the remaining solution plus unreacted solution to get the mass =.= we are not talking about molecular mass difference in here and honestly we still use Ar of Fe to calculate for both ions..

Original post by tgygt
Well, I mean Fe2+ with one more electron than Fe3+ would not be heavier than Fe3+. Both ions have Ar=55.8
Reply 217
Avatar for Quiton
Quiton
3
Talking about sapphire and rugby in here!

Original post by skeletonboy1
Different ligandssplit the d subshell to a different extent and so electrons requiredifferent amount of energy to promote. e.g. Cu(H2O)6]2+ and [Cu(NH3)4]2+
(edited 7 years ago)
Reply 218
Avatar for tgygt
tgygt
2
Is the complex structure [CrCl(H20)5]2+?
Original post by tgygt
Is the complex structure [CrCl(H20)5]2+?


It was the answer I wrote

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