[r4bbit_]

HI, our school is making us determine an unknown acid's identity
So far I've done everything possible and the following r my results:

molar mass of 67 g/mol
monoprotic
Pka of 4.4
soluble in water
weak acid
solid at room temperature
melting point of 135
boiling point around 140
produces ester with ethanol

But i just cannot find the acid, if anyone knows where i should look or anything please reply!

[Arkcon]

Wow, performed all those analytical tests by yourself, and still missing an important part of the puzzle.  OK, lets try this, pick a couple of your favorite analyses and tell us what they tell you.

[r4bbit_]

Well, what I am absolutely certain is that it is monoprotic and its molar mass is 67 g/mol or something around there. This I know for a fact because I did 2 titration curves (monitored using pH probe) and there was a S curve, as well, I've done 4 titrations, 2 using 0.05M and 2 using 0.1 M of NaOH. So molar mass I am most certain. Melting point should be fairly accurate. pKa is only an approximation because the endpoint was hard to locate on the curve.

[azmanam]

Cross posted.  See my response in the ochem section.

[Borek]

Please read forum rules. Topic locked.

Discussion here:

http://www.chemicalforums.com/index.php?topic=23909