Oxn State

Chat i have a doubt during finding Oxn State of an element, cases in which oxn state exceeds valence electrons, For example of CrO5, its oxn comes out to be +10 while its valence electrons is 6 but since its config is 3d5, 4s1 why is 4s1 included in the valence shell (ik its for more stability)
45 Replies
iTeachChem Helper
@Dexter
iTeachChem Helper
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Brok Bot
Brok BotOP5d ago
What the hell It pinged twice
Sephrina
Sephrina5d ago
dont mind
Brok Bot
Brok BotOP5d ago
Anyways guys
Sephrina
Sephrina5d ago
sooo
Opt
Opt5d ago
That indicates peroxylinkage
Brok Bot
Brok BotOP5d ago
Sorry if you dont understand its I cant like word it
Sephrina
Sephrina5d ago
thick what is the oxidation of o
Opt
Opt5d ago
You end up having -O-O- groups
Sephrina
Sephrina5d ago
and then form an equation with oxidation of cr as x and total as zero and solve voila
Opt
Opt5d ago
Won't work. 1 oxygen is in -2, 4 are in -1
Sephrina
Sephrina5d ago
like for this it will bw
Brok Bot
Brok BotOP5d ago
I know that but cant understand why is valence shell 4s1 included even if 3d5
Sephrina
Sephrina5d ago
well idk par humne vaise hi sikha hai aur sahi aaya tha
Brok Bot
Brok BotOP5d ago
I asked my teacher he said that they will explain to us in 12th
Sephrina
Sephrina5d ago
+7 hoga as much as i rememeber
Brok Bot
Brok BotOP5d ago
I know but If the valence electrons are 6
Sephrina
Sephrina5d ago
f block yes
Brok Bot
Brok BotOP5d ago
In its last shell Why is 4s1 even considered
Opt
Opt5d ago
4s is actually the valence shell. However, when you have incomplete d orbitals, the d electrons can jump to 4th orbit and interact with the outside. That's why transition elements end up having variable valencies The d electrons aren't bound by pairing energy, and can jump about Not as much as the outermost ones, but enough to interact
Brok Bot
Brok BotOP5d ago
He said that its because energy loss is for stability And if its half filled or fully filled more energy is lost due to exchange About the half/full filled
Sephrina
Sephrina5d ago
half filled has lesser stability than fully and stability and energy has inverse relarion try thinking with that in mind
Dexter
Dexter5d ago
structures yaad krle bhai
Opt
Opt5d ago
Lol CrO5 is butterfly
Dexter
Dexter5d ago
Jitne bhi oxo acids that are important yeah cr3O8-3 is crazy too
Opt
Opt5d ago
You say that, but H3PO3 has resonance structures
Dexter
Dexter5d ago
i forogor -3 ka just remembered the basic structure yk Phosphorus ke acids are problematic tho thats true Hypophosphorus polyhypo and all the nomenclature is all over the place
Opt
Opt5d ago
Oh, no, that's actually really systematic
Dexter
Dexter5d ago
(n-2)f(n-1)dnsnp all are used as valance shell 🤔 only for a while
iTeachChem
iTeachChem5d ago
this is it. you need the structure @Brok Bot check out my video on redox. Using strcuture/electronegativity difference you assign oxidation states bond wise
Dexter
Dexter5d ago
😁
Brok Bot
Brok BotOP4d ago
Okay thanks
AFK
AFK4d ago
Bro its all about stability, Taught in f block. Half filled are more stable than partially filled That's why few element have config like 3d5 4s1 3d10 4s1 in place of 3d6 4s1 and 3d9 4s2
iTeachChem
iTeachChem4d ago
this is taught in atomic structure actualy. actually* exchange energy, has to do with quantum mechanics + entropy
Brok Bot
Brok BotOP4d ago
The actual doubt is I cant express it literally or vocally Neither digramatically My friend had the same doubt we tried to understand it telepathically
iTeachChem
iTeachChem4d ago
?
AFK
AFK4d ago
they were just the basics then the actual reason comes in
iTeachChem
iTeachChem4d ago
Oh i don’t remember doing anything in f block. But yea the actual reason is not taught in school लोल unless you read Atkins. There too it is superficial.
AFK
AFK4d ago
Right
Brok Bot
Brok BotOP3d ago
Yes Idk man i was always average at chemistry I could never learn how to balance chemical equations I still canf
Nimboi
Nimboi3d ago
for normal chemical equations hit and trial works for all practical purposes
Nimboi
Nimboi3d ago
for redox, check this guide out and do some practice questions
Chemistry LibreTexts
Balancing Redox Reactions
Oxidation-Reduction Reactions, or redox reactions, are reactions in which one reactant is oxidized and one reactant is reduced simultaneously. This module demonstrates how to balance various redox …
Nimboi
Nimboi3d ago
if you can put in the effort to read and revise then chemistry is the easiest subject to get better at

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