Chemical Forums
1 Hour
1 Day
1 Week
1 Month
Forever
December 26, 2024, 06:36:40 PM
Forum Rules
: Read This Before Posting
Home
Help
Search
Login
Register
Chemical Forums
Chemistry Forums for Students
Undergraduate General Chemistry Forum
Determining the Initial Equilibrium Concentration
« previous
next »
Print
Pages: [
1
]
Go Down
Topic: Determining the Initial Equilibrium Concentration (Read 7337 times)
0 Members and 1 Guest are viewing this topic.
!!!
New Member
Posts: 7
Mole Snacks: +0/-0
Gender:
Determining the Initial Equilibrium Concentration
«
on:
February 13, 2008, 10:37:13 PM »
The correct answer is 0.255 M, but I don't know how get to there.
The ICE stands for Initial concentration, Change in concentration, and Concentration at Equilibrium.
Help, please? And thank you!
«
Last Edit: February 14, 2008, 01:03:32 AM by !!!
»
Logged
Sev
Full Member
Posts: 231
Mole Snacks: +43/-6
Gender:
Re: Determining the Initial Equilibrium Concentration
«
Reply #1 on:
February 13, 2008, 11:54:55 PM »
Hi,
At the step: 4.56*10
-3
/[(n-0.228)
2
] = 6.3, just rearrange to: 4.56*10
-3
/6.3 = (n-0.228)
2
].
sqrt both sides: n-0.228 = 0.0269, and solve for n
Logged
Yggdrasil
Retired Staff
Sr. Member
Posts: 3215
Mole Snacks: +485/-21
Gender:
Physical Biochemist
Re: Determining the Initial Equilibrium Concentration
«
Reply #2 on:
February 14, 2008, 12:02:06 AM »
Your set up is correct, you just made a small error in the calculations.
When you square root both sides of the equation then multiply by (n-0.228) the RHS of the resulting equation should be 2.51n - 0.572 since Sqrt[6.30]*0.228 = 0.572.
[edit: Sev got to it first]
Logged
!!!
New Member
Posts: 7
Mole Snacks: +0/-0
Gender:
Re: Determining the Initial Equilibrium Concentration
«
Reply #3 on:
February 14, 2008, 01:05:19 AM »
Oh, dear. I can't believe I overlooked that mistake.
Thank you very much, guys.
Logged
Print
Pages: [
1
]
Go Up
« previous
next »
Sponsored Links
Chemical Forums
Chemistry Forums for Students
Undergraduate General Chemistry Forum
Determining the Initial Equilibrium Concentration