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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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polishprodigy93 polishprodigy93
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5 years ago Edited: 5 years ago, polishprodigy93
Last question I promise!

The [H3O+] of a solution of 4.35 mol/L acetic acid in water is?



answer = a.bcdef? mol/L



Given Ka value for Acetic acid = 1.8 × 10^ –5
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#1
Educator
5 years ago
Solution attached.

Quote from: polishprodigy93 (5 years ago)
Last question I promise!

Don't think that way, the purpose of the site is to help with h/w. Next time, post your math questions too, that's my expertise.
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#2
5 years ago
Why 8.794408 and not 0.008794?
Answer rejected by topic starter
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#3
Educator
5 years ago
Yeah, that's what I meant, forgot to write 10-3...

So:

a.bcdef
0.00879
Answer accepted by topic starter
polishprodigy93 Authorpolishprodigy93
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#4
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5 years ago
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#5
Educator
5 years ago
Just double-checked my calculation, I'm 100% certain that's the correct answer for x -- I subbed it back into the equation and found the left side = right side. Any other questions, let us know
wrote...
#6
5 years ago
So the response was marked wrong on my D2L and I am now waiting to hear from my instructor as to why :/
wrote...
#7
Educator
5 years ago
Could be an error on their part; the math checks out. Let me know what your instructor writes, it's important that we know moving forward 😥
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#8
5 years ago
It was my response Face with Open Mouth I feel so confused now 🙈
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#9
Educator
5 years ago
I noticed something wrong about your screenshot actually. Look at 4.35, it should be (4.35 + x), but they removed the x only because the equilibrium constant is so small. Technically you're NOT supposed to do that. I stand by my answer, it's MORE accurate than the one shown. You should fight it dude.
wrote...
#10
5 years ago
Thanks man, It was him that sent me that screenshot at the end. I wrote to him exactly what you just told me so we'll see 😬he's pretty strict because I once used a different IUPAC name he still marked it wrong in Organic Chemistry. Fingers crossed. 
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#11
Educator
5 years ago
If he's an actual chemistry teacher, he'll agree with us.

🤞
wrote...
#12
Staff Member
5 years ago
Quote from: polishprodigy93 (5 years ago)
Thanks man, It was him that sent me that screenshot at the end. I wrote to him exactly what you just told me so we'll see 😬he's pretty strict because I once used a different IUPAC name he still marked it wrong in Organic Chemistry. Fingers crossed.

Any updates?
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