Sapling Week 1 #9

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Jaclyn Schwartz 1I
Posts: 101
Joined: Wed Sep 30, 2020 9:45 pm

Sapling Week 1 #9

Postby Jaclyn Schwartz 1I » Sun Jan 17, 2021 10:08 pm

For question 9, I cant get the right answer no matter how hard I try. Here is the problem and my values?

At equilibrium, the concentrations in this system were found to be [N2]=[O2]=0.100 M and [NO]=0.600 M.
N2(g)+O2(g)↽−−⇀2NO(g)
If more NO is added, bringing its concentration to 0.900 M, what will the final concentration of NO be after equilibrium is re‑established?

My K=36
[NO]^2/[O2][N2]=k
ice
N2(g)+O2(g)↽−−⇀2NO(g)
i 0.1 0.1 +0.9
c +x +x -2x
e 0.1+x 0.1+x 0.9-2x
[0.9-2x]^2/[0.1+x]^2 =36
x=0.0375
0.9-2x=[NO]

What am I doing wrong? Anything would be extremely helpful!

Jaclyn Schwartz 1I
Posts: 101
Joined: Wed Sep 30, 2020 9:45 pm

Re: Sapling Week 1 #9

Postby Jaclyn Schwartz 1I » Sun Jan 17, 2021 10:10 pm

I figured my error out! thanks tho!

Brandon Gruender 3F
Posts: 96
Joined: Wed Sep 30, 2020 10:03 pm

Re: Sapling Week 1 #9

Postby Brandon Gruender 3F » Sun Jan 17, 2021 10:15 pm

Im honestly struggling to see any faults in your work. Was your final answer 0.825 M? If it was I do not know, maybe contact your TA to help.

Natalie Do 3F
Posts: 120
Joined: Wed Sep 30, 2020 10:03 pm

Re: Sapling Week 1 #9

Postby Natalie Do 3F » Sun Jan 17, 2021 11:06 pm

Thank you for outlining your steps thoroughly! I also got stuck on this question and this helped a lot.


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