Titration results table

I have a titre which requires multiple runs of the burette for the end point to be reached. Does anybody know what the conventional way to record this data is? I've done it like this but I don't know if it's easy to understand.

------------------------------Rough-----Run 1-----Run 2-----Run 3

Initial Reading (cm^3)
Final Reading (cm^3)
Titre (cm^3)

Hyphens instead of spaces...

Those titres aren't concordant, also you'd want the average volume not the total.

Thank you



They aren't averages, I had to run the burette 3 times for the end point to work. So the titre was 137.75cm^3 I don't know how to write that properly in a table though.

Oh right.. As pigster said, you should decrease the concentration. Ideally you don't want to have to refill the burette half way through a titre, although sometimes it is unavoidable.

You should decrease the conc. of the chemical in the burette by a factor of five OR reduce the amount of chemical in the conical by a factor of five. That way you'll use about 25 cm3 of titrant. Using the burette multiple times like that is not best practice; you're introducing equipment uncertainties.

How do you find the concentration of the undiluted solution of the acid in titrations? If possible, could you explain it in terms of ratios e.g. 11.2cm3 (result of titre) : 0.002654 mol (moles in that amount).

My ISA's tomorrow