[kir]

Hi,
This is a question from one of my labs which I am stuck on. The lab is Determining Dissociation Constant of a Weak Acid, I ran three titrations of a 25mL of an unknown weak acid with NaOH. (NaOH was in the buret.)

I have made three titration curve graphs with my data. Given the following equation:
KHC₈H₄O₄ (aq)  NaKC₈H₄O₄ (aq) + H₂O (l)

I need to determine the Molarity of the the NaOH. I have the mols of NaOH. I believe I need to found the Volume value from my graphs but I am stuck. Where do I take the reading? 

I would greatly appreciate a point in the right direction.

Thanks 

[Borek]

You equation misses base on the LHS.

It is not clear to me what your problem is, as things you wrote are confusing (and contradicting). If NaOH was a titrant its concentration was a given. How do you know number of moles of NaOH, if you don't know volume nor concentration?

[kir]

Yes, looking at the problem again and with help from my professor, I realized I was looking at the problem completely wrong! In order to find the Molarity of the NaOH, I need to use the data which was given to us for the standardization of NaOH. The Volume value comes from the initial buret reading and the final buret reading.

The titration curves are a totally separate issue!

Thanks for taking the time to reply.