general chem doubt
what does it mean to have higher hydration??
we know Li has higher hydration than Cs but what does it indicate? high amount of energy is released when the element is hydrated or that hydrated Li has a larger radii than hydrated Cs
18 Replies
@Dexter
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.Larger hydration is referring to energy
If it was talking about radius then that would have been clearly mentioned
so its the radius one here
also , in nacl (aq) which ion will get more hydrated
i believe it should be cl, since cl is smaller it will have higher charge density and thus higher hydration
Na+ jyada chota hoga na
And both cl - and na+ have the same magnitude of charge
So they are equal at that front
radius of na os greater than that of cl, so charge density cl ki jyada hui thus giving it a larger radius in aqueous state
In normal conditions na+ is smaller than cl-
But in water na+ ka hydrated Radius jyada hoga, which one are you talking about
i am talking bout hydrated state only
ok so na+ is smaller than cl- . this means na+ has higher charge density thus giving it more radius in hydrated state
am i correct with the reasoning?
hydrated state me need not be that na+ is smaller than cl-, data dekhna padega. gaseous ions, yea you are right
both of these thigns imply the same thing
if there are more water molecules that surround ions
the hydration energy will be higher
https://www.researchgate.net/figure/Comparison-of-hydration-radius-and-hydration-number-of-sodium-and-chloride-ions-a_fig5_228544030#:~:text=The%20hydration%20radius%20for%20sodium,chloride%20ions%20is%203.2%20%C3%85.
idk how credible this source is but the data here contradicts our discussion
ohh, got it
yea sahi kaam kiya aapne. :D
Anyway i thought our convo was about cations? to be comparing apples to apples :)
Nah my doubt was in hydrated state na+ is bigger or cl-
aah. Yea that from data haha
how can we prove it tho
researcxh article me details hongi
When a charged surface is present in an aqueous solu-
tion, a potential difference is formed across the interface,
leading to electron accumulation or depletion on the surface
and counterion accumulation in the solution at the interface
to balance the charge. This concentration polarization phe-
nomenon is usually known as electrical double-layer ~EDL!
formation.1
this
electrical double layers is something you would study in colloids in materials engi or perhaps thoda bohot school me but i think they removed surface chem lol
basically using electrochem (short answer)
https://www.ceb.cam.ac.uk/research/groups/rg-eme/Edu/the-electrical-double-layer
here is some more reading if you want
aight, ill read the article. marking it solced now, thanx for the help
+solved @iTeachChem @¹¹⁷sos
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