## Homework #89 Ch.11

805132275
Posts: 47
Joined: Fri Sep 28, 2018 12:26 am

### Homework #89 Ch.11

I don't understand how to know if the equation we derived from A-->B+C has coefficients as the true answer?

Michael Torres 4I
Posts: 92
Joined: Thu May 10, 2018 3:00 am
Been upvoted: 1 time

### Re: Homework #89 Ch.11

A changes from about 27.5 to about 17.5. C changes from 0 to 10. B changes from 0 to 5.

If the change in values is understood as X, then X = 5. B's value increased by X, whereas the values of A and C both changed by 2X.

Therefore, K = ([2X]^2[X])/[27.5-2X]^2 in the form of ([C]^c[B]^b)/[A]^a. As seen in ICE box diagrams, when 2X is subtracted or added to something, that something has twice the number of moles relative to something else whose value is only changed by X. You can let X be whatever you want, but in this case I have set X=5, so 2X=10.

Therefore, 2A --> B + 2C.

Return to “Equilibrium Constants & Calculating Concentrations”

### Who is online

Users browsing this forum: No registered users and 1 guest