[ufu88]

i titrated 2 ml of a monoprotic acid to find its concentration, and repeated it  5 times.
i used a computer program to do that and got a graph which shows amplitude against time elapsed.
the time measured between two points on the graph with the same amplitude was about 90 sec.
is there a way of finding the acid concentration without knowing the current?
(in the preperation for this lab it says that the current is between 20 and 50 mA)

[Borek]

You don't have to know current, but you have to know charge.

[ufu88]

the charge of which molecule should i know?
i know that the electrode produced OH- ions, and the acid produce one H+
i dont understand what should i do next.

[Borek]

Not charge of the molecule, but charge that passed through the solution. Please read in your textbook what the coulometric titration is about.