• We’re currently investigating an issue related to the forum theme and styling that is impacting page layout and visual formatting. The problem has been identified, and we are actively working on a resolution. There is no impact to user data or functionality, this is strictly a front-end display issue. We’ll post an update once the fix has been deployed. Thanks for your patience while we get this sorted.

Chemistry Equillibrium Concentrations

D

derek358

Member
Can someone help me solve this problem and explain the procedure taken to solve it?

A short explanation is fine because i will realize what to do but right now im just stuck?

In chemistry we were given a problem and told that only a few people will be able to solve it since it is an AP question.

the problem is as follows:

For the equillibrium 2A (gas) + B (gas) <> C (gas) K= 2.5 * 10^3 or (2500)
Assume 1 mole of A and 1 mole of B are placed into a 1 liter flask.
What are the concentrations of A,B,C at equillibrium?

Please help me answer this. Thanks guys.
 
come on guys can u please help me

i read something about it right now and it helped a little but im still not sure what the molarity of the 2 moles would be
 
The general solution for an equilibrium constant is the activity of products over the activity of reactants. The 'activity' for your purposes will be nothing but the concentration of each species raised to the power of the stoichiometric coefficient.

Remember, this forum isn't for homework, though you can PM me with chemistry questions and I can probably help. 😉
 
K = [C]/([A]^2*[B.]) = 2.5x10^3

Use stoichiometry, pay special attention to the coefficient of gas A.

Addition:

Make an ICE (initial, change, equilibrium table):

.....2A + B --> C
I..1mol | 1mol | 0 mol
C.-2x | -x | +x
E. 1-2x | 1-x | x

The change line is your stoichiometric ratio line, you gain on C because of Le Chatelier's principle.

Plug the E line values into the K equation I gave you above, solve for x. Then plug x back into the E line for the final moles of each gas. Don't forget to square the A value.
 
You must log in or register to reply here.

TRENDING THREADS

Back
Top