Bronstead Lowry Acid or base? Give Conjugate

Question

amtran_bus · Answer

Bronstead –Lowry acid or base? Give conjugate.
a) HCNO
b) OBr-
c) HClO3
d) CH3NH3+
e) ClNH2
f) HONH2

Is it:
a) Acid, conj. Is CNO-
b) Base, conj. Is HOBr
c) Acid, conj. Is ClO3-
d) Acid , conj. Is CH3NH2
e) Acid, conj. Is ClNH-
f) Acid, HOnH-?

amtran_bus · Answer

I think e is a base.

accessdenied · Answer

That is what I was thinking as well.
I have not covered these theories on acid/bases very well, I just remember the definition being "acids donate protons, bases accept them".  The first a-d look fine to me with that in mind.  e and f look like more interesting cases.
I'm just doing more research to confirm what I want to say before I give you a wrong idea.

amtran_bus · Answer

Thank you so much. Greatly appreciated!

accessdenied · Answer

In the case of ClNH2, N has a lone pair of electrons which could accept a Hydrogen proton.
             .. 
   Cl --  N  -  H
              \H

accessdenied · Answer

Making a ClNH3+, ClNH2 being a base accepting the Hydrogen.

amtran_bus · Answer

Ok. Man I need to get familiar with drawing those again. I think F is a base too? How can I tell?

accessdenied · Answer

It seems to be the same case, actually.  Note the ending NH2 again.
  It looks like this though:
                 . .
  H - O  -  N  - H
                   \N

accessdenied · Answer

oops,  \H  not \N  at the bottom.

amtran_bus · Answer

Ok. Thanks. I think this is starting to make some sense. I have one more question in the book like this one I need to work.

amtran_bus · Answer

Thanks!

accessdenied · Answer

You're welcome!  :)