Chemical Forums
1 Hour
1 Day
1 Week
1 Month
Forever
March 29, 2024, 08:26:52 AM
Forum Rules
: Read This Before Posting
Home
Help
Search
Login
Register
Chemical Forums
Chemistry Forums for Students
Undergraduate General Chemistry Forum
Ionic strenght Na2SO4
« previous
next »
Print
Pages: [
1
]
Go Down
Topic: Ionic strenght Na2SO4 (Read 1054 times)
0 Members and 1 Guest are viewing this topic.
xshadow
Full Member
Posts: 427
Mole Snacks: +1/-0
Ionic strenght Na2SO4
«
on:
January 27, 2019, 04:30:31 AM »
HI, I know the ionic strenght of Na
2
SO
4
0.0250M is:
μ= 1/2*(0.0500*(+1)
2
+ 0.0250*(-2)
2
)= 0.0750
But this if I put [SO
4
2-
]=2* C
Na2SO4
(no hydrolysis)
But can occur the reaction :
SO
4
2-
+ H
2
O <------> HSO
4
-
+ OH
-
pkb
Now what's the μ expression when I consider the partial dissociation?
Perhaps
μ=1/2*(0.0500*(+1)
2
+ 0.0250*(-2)
2
*α
SO42-
+ 0.0250* (-1)
2
*α
HSO4
-
)
Thanks
Logged
Borek
Mr. pH
Administrator
Deity Member
Posts: 27634
Mole Snacks: +1799/-410
Gender:
I am known to be occasionally wrong.
Re: Ionic strenght Na2SO4
«
Reply #1 on:
January 27, 2019, 12:43:28 PM »
You need to find the equilibrium concentrations of all ions involved and use them to calculate ionic strength. It will change the equilibrium so you should then recalculate everything. Typically 2-3 iterations are enough.
Logged
ChemBuddy
chemical calculators - stoichiometry, pH, concentration, buffer preparation,
titrations.info
Print
Pages: [
1
]
Go Up
« previous
next »
Sponsored Links
Chemical Forums
Chemistry Forums for Students
Undergraduate General Chemistry Forum
Ionic strenght Na2SO4