Recent content by sd34

Thanks a lot! So basically I switched no.1 and no.2 in terms of priority.

No.12 was given by our teacher ( this exercise was in the previous exam)...it’s more like hypothetically speaking. They just want to test if we know which form that molecule is in at pH x. So...I guess in this case the correct answer is d).

If it’s not too much of a trouble, could you redraw the molecule?

Okay, but isn’t the priority still the same?

Okay, I have another doubt. Why the carbon on the right is S and not R? Aren’t the priorities like this?

I have the following molecule: benzotriazole. It has pka=12. At pH=6 which form prevails? a) neutral b) anionic c) cationic d) none of the above. I thought the correct answer was c) cationic: pH<pka, benzotriazole has basic functional groups (amines).

Yes, it’s correct. Basically the mistake I made was that I gave the first priority to COOH instead of NH2 in the first molecule, whereas in the second one I forgot to switch from R to S.