[skibum143]

Hi...I'm confused about the % Dissociation on the attached problem:

What is the percent dissociation of HX? (image attached)

Our book defines percent dissociation as HA dissociated / HA initial * 100 is the % HA dissociated. But when I use that formula for the HX reaction, my answer is wrong. (4 dissociated / 10 initial = 40%) Please *delete me* I don't know the molarity in the problem so I was just using the number of molecules.

[ContinuousProcess]

Looking at the HX box I see six HA and four particles coming from two dissociated HA's.

[Borek]

(4 dissociated / 10 initial = 40%)

Why 4, why 10?

[skibum143]

I guess I'm confused on what the "Initial" HA count would be. I thought since HA + H20 -> H30+ + A-, that there would have been 10 HA originally, to end up with 6HA, 2H30+ and 2A-. But maybe since each HA creates 1H30+ and 1A-, there were only 8 HA originally?

So would that mean 2 / 8 = 25%?

I'll wait to try that until I get some feedback since I'm on my last try on my HW. Thanks so much for your *delete me*!

[opti384]

Ithere were only 8 HA originally?

Yes.

[skibum143]

I see. Thanks again for your *delete me*