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polishprodigy93 polishprodigy93
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4 months ago Edited: 4 months 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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wrote...
Educator
4 months ago
Solution attached.

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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wrote...
4 months ago
Why 8.794408 and not 0.008794?
Answer rejected by topic starter
wrote...
Educator
4 months ago
Yeah, that's what I meant, forgot to write 10-3...

So:

a.bcdef
0.00879
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Answer accepted by topic starter
polishprodigy93polishprodigy93
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4 months ago
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Sorry at @bio_man I recalculated this another time and got. square root= (4.35(1.8x10^-5) = 0.088487287
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wrote...
Educator
4 months 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
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wrote...
4 months ago
So the response was marked wrong on my D2L and I am now waiting to hear from my instructor as to why :/
wrote...
Educator
4 months 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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wrote...
4 months ago
It was my response Face with Open Mouth I feel so confused now 🙈
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wrote...
Educator
4 months 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.
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wrote...
4 months 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. 
wrote...
Educator
4 months ago
If he's an actual chemistry teacher, he'll agree with us.

🤞
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wrote...
Staff Member
4 months 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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