[Molality]

First let me say that I am happy that this forum exists, but I also dislike the verification process too, it took me 8 attempts... I digress.

So I'm doing this online chemistry homework on mastering chem. I am almost done, next to the last question..so far so good.  Over 20 attempts at putting the right answer in, all are wrong. I am pretty sure I am doing everything right. So I would respectfully request if you can check my answer to the following question.

Question:
Calculate the concentration of all species in a 0.10M KF solution.
Express your answer using two significant figures. Enter your answers numerically separated by commas.

[K+], [F−], [HF], [OH−], [H3O+] =

My Answers (I tried different things because I second guess myself):
1.  .10,.10,1.59⋅10−11,1.26⋅10−6,7.93⋅10−9 M
2.  .10,.10,.0011,1.26⋅10−6,7.93⋅10−9 M
3. .10,.10,.0001,1.26⋅10−6,7.93⋅10−9 M
4. .10,.10,1.26⋅10−6,1.26⋅10−6,7.93⋅10−9 M
5. .10,.10,6.3⋅10−4,1.26⋅10−6,7.93⋅10−9 M
...
...
24. .10,.10,6.3⋅10−4,1.26⋅10−6,7.93⋅10−9 M
25. .10,.10,6.3⋅10−4,1.26⋅10−6,7.93⋅10−8 M

[Borek]

No idea what kind of help you expect. None of the answers listed looks like what I got - but I have no idea what value of Ka you have used in your calculations.

[Molality]

Looking for guidance for help. I think I have a handle on the ICE table. I am using 6.3*10^-4 for Ka.

I appreciate you feedback.

[Borek]

OK. Now, there is only one correct answer, so apparently some of the calculations you did were wrong.

Ca you for example show how you got the first set of numbers?